Which statement describes Schedule maintenance?

• A. Reactive maintenance after a failure
• B. Any servicing or replacing of parts that is required because a component is no longer serviceable or has failed
• C. A daily visual inspection only
• D. An optional check performed yearly

Answer: (B)

Schedule maintenance is the planned, regular upkeep that keeps a drone system safe and functional by servicing or replacing parts that are no longer serviceable or have failed. This approach aims to address wear and potential issues before they lead to malfunctions, aligning maintenance with a schedule to maintain reliability. The other statements describe scenarios that aren’t part of a planned maintenance plan: fixing things after a failure is reactive, a daily visual check is just a basic inspection, and an optional yearly check isn’t a guaranteed scheduled task.