Garmin Flight Deck 100 User Manual

190-00728-04  Rev. A

162

A passenger address system is provided by pressing the PA Key to deliver messages to the headsets of the 

passengers (if installed).  The message is heard by the other pilot on the headset only if the PA Key is enabled 
on both audio panels.  PA messages are one way from the flight deck to the passengers.

A  Push-to-talk  (PTT)  must  be  pressed  to  deliver  PA  announcements  to  the  passengers  over  their

headphones.

When PA is selected on the Audio Panel, the annunciator flashes about once per second while pressing the 

PTT, the COM MIC annunciator is no longer lit, and the active COM frequency for that Audio Panel changes to
white, indicating that there is no COM selected.

Both  the  pilot  and  the  copilot  can  transmit  and  receive  simultaneously  over  separate  COM  radios.    The

selected COM MIC Annunciator flashes when either pilot’s microphone PTT is pressed.

If both pilots select the same COM radio, the pilot has priority on COM1 and the copilot has priority on

COM2.