Is a written endorsement required for a student pilot to solo?

A written endorsement is indeed required for a student pilot to solo. The endorsement confirms that the instructor has verified the student's proficiency and readiness to operate the aircraft solo. Under FAA regulations, this endorsement is specifically valid for 90 days. It ensures that the student pilot demonstrates the necessary skills and knowledge to handle the aircraft safely when flying alone. This requirement is in place to enhance safety by ensuring that the student has recent training before undertaking a solo flight. By providing a valid and time-limited endorsement, it holds both the instructor and the student accountable for the student’s preparedness for solo operations.