About the CREW button

    
         
   

Pilot and Copilot audio isolation from the back seat headsets

    
         
    Pressing the CREW button isolates the front seat audio. The pilot and Copilot only hear radio and ADF audio.    
   

The rear seat headsets can talk together but not to the front seats and cannot hear radio audio.

    
         
    Refer to the GMA 340 Audio Panel pilots guide for further details of this mode    
         
    Deselecting both the CREW and PILOT buttons (With a second press) allows all headsets to talk to each other and hear all selected radios