What documents must be prepared when a required inspection finds defects that render the aircraft or engine unairworthy?

When an inspection reveals defects that render an aircraft or engine unairworthy, it is essential to create maintenance entries that document the findings accurately. This is vital to maintain compliance with aviation regulations and ensure the safety of operations. The entries must detail the nature of the discrepancies, which helps in tracking the issues and planning the necessary repairs or maintenance actions. Listing the unairworthy items clearly not only provides a reference for further corrective measures but also ensures that all stakeholders, including maintenance personnel and regulatory authorities, are aware of the aircraft's status.

In contrast, while maintaining a summary report of maintenance performed may be useful for record-keeping, it does not capture the specific defects noted during the inspection. Similarly, an inspection certificate and a log of parts replaced serve different purposes and do not focus on documenting the unairworthy status of the equipment. Notifying the manufacturer of defects may be relevant in certain cases, but it is not a requirement for all inspections and does not substitute for maintaining proper documentation about the aircraft's condition as dictated by applicable maintenance regulations.