A319 and A320 Knowledge Skills Verification (KSV) Practice Exam

Calling the flight deck from the cabin is done through the interphone by selecting the Captain line. For a routine call, the standard action is to press the CAPT button twice. This double action places a normal cabin-to-flight-deck call that the flight crew recognizes as routine. A single press generally won’t establish the proper routine connection, and three presses isn’t the standard routine signal. Using the public address system is for passenger announcements and doesn’t provide a direct, private call to the flight deck. So, the twice-pressed CAPT interphone call is the correct method.