Which type of maintenance focuses on preventive actions to avoid failures?

Preventive maintenance is specifically designed to perform actions that prevent equipment failures before they occur. This type of maintenance emphasizes regular, planned inspections, servicing, and part replacements based on time or usage intervals, which help to extend the lifespan of the equipment and ensure its reliability. By addressing potential issues proactively, preventive maintenance minimizes the likelihood of unexpected breakdowns, thus enhancing operational effectiveness.

Scheduled maintenance refers to the timing of the maintenance activities, which may include a variety of tasks, including preventive actions but not exclusively focused on them. Unscheduled maintenance deals with unexpected repairs due to sudden equipment failures, which contrasts with the proactive nature of preventive maintenance. Off-equipment maintenance involves servicing components that are removed from the aircraft, which may or may not include preventive measures but does not inherently focus on avoiding failures like preventive maintenance does.