MD-11 Flight Crew Operations Manual
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Communications -
Controls and Displays
Comm.30.6
Control Wheel Microphone and PTT Switches
1. Control Wheel Microphone Switch
This 3-position switch keys the flight interphone system as follows:
• Forward (Momentary) - Interphone.
• Aft (Momentary) - Radio.
• Center - Off.
2. RADIO PTT Switch (2)
RADIO PTT - Push for radio transmission through the boom or oxygen mask
microphone.
P
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LB1-3-0015A
LIGHT CONTROL PANEL
October 02, 2006
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