When must elementary work on an aircraft be entered and signed?

The requirement for elementary work on an aircraft to be entered and signed by the pilot who performed it in the journey log underscores the importance of maintaining accurate and up-to-date records for aircraft maintenance and safety. This signing serves as a formal acknowledgment that the pilot has completed the work, which is crucial for ensuring airworthiness and compliance with aviation regulations.

Recording this work is essential for tracking the maintenance history of the aircraft, and it provides a clear trail for inspections, future maintenance, and any necessary follow-up actions. The journey log functions as a comprehensive record of activities undertaken on the aircraft, and pilots must document elementary work promptly to maintain compliance with regulatory standards.

The other choices, while they pertain to aircraft maintenance and operations, do not specifically address the immediate requirement for the pilot to log and sign elementary work. Maintenance-related actions, completion of operations, or changes in ownership do have their own logging requirements but are not tied directly to the process of elementary work documentation by the pilot.