What is the definition of a cycle in aviation?

The definition of a cycle in aviation is best described as one complete take-off and landing. This definition is crucial because it emphasizes the dual aspects of flight operations that are integral to the performance and operation of an aircraft. A cycle encompasses both the departure phase, where an aircraft takes off, and the arrival phase, when it lands back at the airport.

Understanding cycles is important for various reasons: maintenance schedules are often based on the number of cycles an aircraft has completed, as certain stresses and wear occur primarily during take-off and landing, rather than during flight. Moreover, airlines and operators track cycles to manage operational efficiency, fuel consumption, and component life, as some aircraft systems require specific servicing after a number of cycles rather than flight hours.

The other options provide definitions that do not fully capture the comprehensive nature of a cycle. For example, a flight from departure to arrival does not specifically address the critical landing aspect related to a cycle. While two flights without maintenance might imply operational continuance, it overlooks the necessary take-off and landing, and a routine maintenance visit does not pertain to the operational definition of a cycle at all. Hence, the definition that accurately describes a cycle in aviation focuses on the complete process of take-off and landing.