What are the two main types of maintenance in aviation?

The correct identification of the two main types of maintenance in aviation is defined by scheduled and unscheduled maintenance. Scheduled maintenance refers to systematic checks and servicing that is performed on an aircraft at regular intervals, often dictated by a set flight hours or calendar time. This proactive approach helps to prevent issues from arising and ensures that aircraft remain in optimal operational condition.

On the other hand, unscheduled maintenance occurs as a response to an unexpected failure or malfunction. This type of maintenance is reactive, addressing immediate repairs needed to restore aircraft functionality. It is crucial in maintaining safety and reliability in aviation operations, as it ensures that any unforeseen issues are dealt with as they arise.

While rework and upkeep can involve aspects of maintenance, they do not encompass the broader categories defined in aviation maintenance practices. Preventive and corrective maintenance is another category often used in maintenance but does not align with the standard classifications typically recognized in aviation maintenance terminology. Daily and phase inspections deal more specifically with specific types of maintenance tasks rather than overarching categories. Understanding these distinctions helps clarify how maintenance activities are organized to ensure aircraft safety and performance.