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5.20.10 Boeing Proprietary
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787 Flight Crew Operations Manual
Communications Chapter 5
Interphone Systems Section 30
Boeing Proprietary 5.30.1
5.30 Communications-Interphone Systems Interphone Communication System
The interphone communication system includes the:
The flight interphone, service interphone, and passenger address systems are
normally operated through the audio select panel. The cabin interphone is
operated through the TCP or the flight deck handset.
Flight Interphone System
The flight interphone system provides communications on the flight deck and
between the flight deck and the ground crew through the flight interphone jack on
the APU ground control fire protection panel in the nose landing gear wheel well.
The system is used by selecting the INT (interphone) position of a control wheel
or audio control panel mic/interphone switch. The interphone can also be used by
selecting the FLT transmitter selector on an audio control panel and then selecting
one of the following microphone switches:
• MIC position of a control wheel switch
• MIC position of an audio control panel mic/interphone switch
• a hand microphone push to talk switch
• a glareshield MIC switch.
Crew alerting of a ground crew initiated call is provided by an aural alert chime,
the GROUND CALL EICAS communications alert message, and a CALL light
illuminated on the audio control panel transmitter select switch.
Service Interphone System
The service interphone system provides voice communications between ground
crew stations at various locations around the airplane. The system can be
connected to the flight interphone system through the service interphone switch
on the overhead panel.
Passenger Address System
The passenger address (PA) system is used by the flight crew to make cabin
announcements. Pushing a PA mic switch on an audio control panel provides
direct access to all PA areas.
• flight interphone system
• cabin interphone system
• service interphone system
• passenger address (PA) system.
787 Flight Crew Operations Manual
Communications -
Interphone Systems
5.30.2 Boeing Proprietary
The system is monitored by pushing the PA receiver volume control on an audio
control panel. The PA system can also be selected through the cabin interphone
system or the flight deck handset.
Cabin PA announcement priorities are:
• flight deck announcements from an audio control panel
• cabin handset direct access announcements
• priority (all area) announcements
• normal announcements from flight attendant or flight deck handsets.
Cabin Interphone System
The cabin interphone system provides voice communications between the flight
deck and the flight attendant stations. Boom microphones, oxygen mask
microphones, and hand microphones are used by selecting the CAB (cabin)
transmitter select switch on an audio control panel and pushing the mic/interphone
switch to the MIC position. A cabin interphone station(s) must be selected and a
call initiated from the TCP CABIN INTRERPHONE page to alert the desired
station to pick up the call.
EICAS communications alert messages and chimes alert the pilots to incoming
cabin calls. Normal priority calls from the cabin display the CABIN CALL
EICAS message. Normal priority calls made to the flight deck while another call
is in progress will result in a busy signal at the handset, the calling station being
displayed in the call queue, and the CABIN CALL memo message being set in
EICAS. The call queue and memo messages will be cleared when communication
is established between that calling station and the flight deck. Priority calls from
the cabin display the CABIN ALERT EICAS message. Priority calls
automatically disconnect lower priority cabin interphone calls. Priority calls
placed while a priority call is in progress are automatically connected as a
conference call.
The cabin interphone call queue, speed dial numbers, and directories are accessed
from the TCP CABIN INTERPHONE page menu.
Calls are initiated by:
• line selecting a one of three predefined SPEED DIAL locations on the
CABIN INTERPHONE page, or
• accessing the DIRECTORY menu, selecting the appropriate subdirectory
and then selecting the desired call location(s), or
• manually entering a valid two digit dial code in the scratchpad and
selecting MAKE CALL.
Pushing the audio control panel CAB (cabin) transmitter select switch twice
within one second places a priority call to an airline–designated call location.
　
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