What action should be taken after removing the handset to make a PA?

After removing the handset, the appropriate action to initiate a public address (PA) announcement is to push and hold the 'Push to Talk' button. This button serves a critical function in communication systems, as it activates the microphone, allowing the user to speak clearly into the system. By holding this button, the individual ensures that their voice is transmitted over the PA system effectively, reaching all passengers and crew members on board.

Other options may involve different aspects of operating the communication system. For instance, resetting the system, while useful in troubleshooting, is unnecessary for making a PA. Waiting for crew confirmation is not relevant in this scenario, as making a PA is typically a direct action taken by the crew member upon removing the handset. Adjusting volume settings may improve the audibility of announcements but is not a mandatory step immediately following the removal of the handset. Thus, pushing and holding the 'Push to Talk' button is the decisive action necessary for the PA announcement.