What mechanism is used to lock or unlock the door on the A320?

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The control handle is the mechanism used to lock or unlock the door on the A320. This handle operates a series of mechanical linkages that engage and disengage the door's locking system when the handle is turned. When the handle is positioned correctly, it secures the door tightly against the airframe, ensuring that it cannot inadvertently open during flight. Conversely, rotating the handle to the unlock position releases the locks, allowing the door to be opened.

Understanding the operation of the control handle is crucial for cabin crew and maintenance personnel as it directly affects safety and access to the aircraft. Other mechanisms listed, such as emergency locks, keypad locks, and magnetic locks, are not used for the primary function of locking or unlocking the A320's main doors. These options might be relevant in different contexts or types of aircraft but do not pertain to the A320's specific door operation.

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