What must be done before an aircraft can be returned to service after maintenance work?

Before an aircraft can be returned to service after maintenance work, it is essential to ensure that all necessary maintenance records are completed. This step is crucial because it provides a documented history of the maintenance performed, which is vital for regulatory compliance, safety standards, and future maintenance work. The completion of maintenance records ensures that all repairs and inspections are recorded and that the aircraft meets the requirements set by aviation authorities.

The maintenance records serve as evidence that the work done is in line with relevant regulations and standards, contributing to the overall safety and airworthiness of the aircraft. Without proper documentation, there could be issues with accountability, traceability, and potential non-compliance with aviation regulations, which could result in safety risks.

While a detailed inspection by the pilot, confirmation of parts being of new quality, and sign-offs from external audits may be important in certain contexts, the foundational requirement of ensuring that maintenance records are complete is critical for the overall process of returning an aircraft to service.