737 MAX Flight Crew Operations Manual
Communications -
Controls and Indicators
5.10.14
MN-FLT-OH-201
Interphone and Passenger Address Controls
1
SERVICE INTERPHONE Switch
OFF –
• external jacks are deactivated
• communication between flight deck and flight attendants is still
possible.
ON – adds external jacks to service interphone system.
2
Service INTERPHONE Handset Jack
With microphone installed, used to communicate with flight attendant stations:
• with SERVICE INTERPHONE switch ON, also used to communicate
with any external jack location
• bypasses ACP.
INTERPHONE
PASS
ADDRESS
PHONE
INTER
FLIGHT
CONTROL STAND
1
AFT OVHD PANEL
EXTERNAL POWER
CONNECTOR PANEL
FLIGHT DECK CREW/
ATTENDANT STATIONS
(AS INSTALLED)
2
3
4
5
SERVICE
OFF
INTERPHONE
ON
October 26, 2021
