What must a pilot do after performing elementary work on an aircraft?

After performing elementary work on an aircraft, a pilot is required to enter the details of that work into the journey log and sign it. This practice is essential for ensuring proper documentation of all maintenance activities carried out on the aircraft. The journey log serves as a record that provides information about the aircraft's maintenance history and compliance with safety regulations. This documentation not only helps in maintaining accountability but also assists in tracking the aircraft's airworthiness and any modifications made to it.

In addition, the signed entry provides legal assurance that the pilot has conducted the necessary checks or repairs, thus fulfilling regulatory requirements. This is particularly important for maintaining safety standards as it allows for transparency and traceability in aircraft operations.