How are the intervals for Special Inspections determined?

The intervals for Special Inspections are determined by flight hours or calendar time because this approach ensures that aircraft and equipment are maintained at optimal safety and performance levels. By linking inspections to the amount of operational use—measured in flight hours—and the passage of time, this method allows for a systematic approach to maintenance that addresses wear and tear that can occur over time and with usage. This is important for identifying potential issues before they affect operational readiness and safety.

The use of flight hours or calendar time is a standardized practice in aviation maintenance to provide a predictable framework for inspections, allowing maintenance personnel to plan effectively and ensuring that inspections are conducted regularly and at appropriate intervals based on the actual usage of the equipment. This proactive maintenance strategy is essential for enhancing reliability, increasing aircraft longevity, and safeguarding personnel.