What is the main use of a door handle inside an aircraft?

The main use of a door handle inside an aircraft is to open or close a door. This function is critical for both passenger access and safety. The design of door handles is specifically intended to facilitate the smooth operation of doors, allowing crew members and passengers to enter and exit the aircraft efficiently. It's important for the door to be securely closed during flight, which is why these handles are engineered to ensure proper engagement with the door frame.

While accessing the cockpit or securing overhead luggage compartments are essential aspects of flight safety and operations, they do not directly relate to the primary function of a door handle. Additionally, emergency communications are typically achieved through other means, such as cabin intercom systems or signaling devices. The role of a door handle remains focused on the fundamental operation of aircraft doors.