What does 'deplaning' refer to in aviation terminology?

In aviation terminology, 'deplaning' specifically refers to the process of passengers leaving the aircraft. This term is commonly used in the airline industry to describe the procedure that occurs after the aircraft has landed and comes to a complete stop at the gate. During deplaning, flight attendants assist passengers in exiting the aircraft in a safe and orderly manner. This process follows the arrival of the flight and is distinct from boarding, which involves passengers entering the aircraft before takeoff.

The other options describe different aspects of aviation, such as boarding passengers, the aircraft's time in the air, or maintenance checks, but they do not relate to the act of passengers leaving the aircraft, which is the essential meaning of deplaning. This distinction clarifies that deplaning is centered around the conclusion of a flight journey, making it an important part of the travel experience.