What is the required procedure to make a cabin announcement using the Public Address System?

• A. Move the transmit switch on the audio control panel to PA, then press PA switch light on the Interphone Control Unit
• B. Press the PA switch only
• C. Use a handheld microphone
• D. Request clearance from ATC before talking

Answer: (A)

To broadcast a cabin announcement, you must route your voice through the Public Address path and enable the PA system. First, move the transmit switch on the audio control panel to the PA position, selecting the PA channel as the active path. Then press the PA switch light on the Interphone Control Unit to turn on the PA amplifier and connect your microphone to the cabin speakers. The light confirms the PA is active, so your voice will be heard in the cabin. If you skip the path selection, or skip activating the PA, nothing will be transmitted. A handheld microphone isn’t part of the required procedure, and you don’t need ATC clearance to speak to passengers.