Which part of the FARs addresses the certifications of pilots and flight instructors?

The correct answer is Part 61 of the Federal Aviation Regulations (FARs). This part specifically outlines the requirements for obtaining pilot certificates, including various categories and classes, as well as the qualifications necessary for flight instructors. It details the training, testing, currency, and aeronautical experience needed to achieve and maintain these certifications.

Understanding Part 61 is crucial for aspiring pilots and instructors as it serves as the foundation for what is required to legally operate aircraft and teach others to do so. This includes specifics about the necessary hours of flight experience, the types of instructional endorsements required, and regulations for different types of pilot certificates, such as private, commercial, and airline transport.

The other parts mentioned, like Part 91 and Part 121, primarily cover operational regulations for general aviation and commercial aviation respectively, while Part 91.1 is a specific section that outlines general operating and flight rules but does not address certification requirements. Therefore, they do not contain the pertinent information regarding pilot and instructor certifications found in Part 61.