What is one of the main responsibilities of a flight instructor regarding endorsements?

The main responsibility of a flight instructor regarding endorsements is to endorse a student pilot's logbook with specific limitations as needed. This practice is essential for ensuring that students are adequately prepared for the flying tasks they are authorized to undertake. Endorsements serve as a record of the instructor's assessment of the student’s skills and readiness, highlighting both their capabilities and any limitations that may apply.

By providing detailed endorsements, the flight instructor ensures that the student is aware of what they are permitted to do and what they still need to work on. This practice enhances safety by preventing students from attempting maneuvers or flights for which they are not yet fully qualified or prepared. It also aligns with regulatory requirements, as students must have appropriate endorsements for solo flights, cross-country flights, or specific maneuvers.

In contrast, self-endorsement of one's own logbook does not serve the purpose of assessing student pilot readiness. Similarly, merely requiring students to complete a written test does not encompass the hands-on assessment or flying skills necessary for safe operation of the aircraft. Lastly, endorsing every student for a cross-country flight regardless of ability would neglect the critical evaluation process that ensures students can safely conduct such flights.