What is an essential requirement for completing the Daily Inspection?

The essential requirement for completing the Daily Inspection is that no flight occurs during the validity period. This means that the inspection must be conducted while the aircraft is not in service, ensuring that all necessary checks can be performed without the added complications that flying entails. Conducting inspections while the aircraft is stationary allows for thorough examination of all systems and components, which is critical to maintaining safety and readiness.

Choosing this response highlights the importance of ensuring that the aircraft is not operational at the time of inspection, as this directly correlates to the integrity of the inspection process, allowing for focused attention on maintenance and safety checks before the aircraft is cleared for flight again. This underscores the role of the Daily Inspection as a preventive measure to ensure aircraft safety and performance.

The other options, while they may relate to different aspects of operational readiness or inspection requirements, do not serve as foundational criteria specific to the completion of a Daily Inspection in the same way.