How does the flight crew communicate with the cabin crew?

The correct method for communication between the flight crew and cabin crew is primarily through pressing the attendant button located in the pilot's overhead panel. This button activates a chime or indicator that notifies cabin crew members that the flight deck needs to communicate with them.

This form of communication is effective because it allows for immediate attention to be drawn to the flight crew's needs without the potential disruption that could be caused by using the intercom system for routine messages. Additionally, using the attendant button establishes a direct line for urgent or critical communications, which is essential for maintaining safety and operational efficiency during flight.

In contrast, while the intercom system is also a valid way for the flight crew to communicate with the cabin crew, it's typically reserved for more formal announcements or during times when more detailed information needs to be conveyed. Hand signals and written messages are not standard practices for real-time communication in the operational environment of an aircraft, as these methods are not immediate and could lead to misunderstandings or delays.