787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Communications Chapter 5
Interphone Systems Section 30
Copyright © The Boeing Company. See title page for details.
D615Z003-TBC 5.30.1
5.30 Communications-Interphone Systems
Communications30 Interphone SystemsInterphone 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
Note: Voice level from the flight deck speakers decreases when selecting the
MIC/INT switch on the ACP or control wheel, the PTT switch on the hand
microphone, or the MIC switch on the glareshield.
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.
• flight interphone system
• cabin interphone system
• service interphone system
• passenger address (PA) system
August 14, 2009
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