Which regulation outlines the requirements for flight crew member duty and rest requirements?

The regulation that outlines the requirements for flight crew member duty and rest requirements is FAR Part 117. This part specifically addresses the regulations that govern flight and duty time limitations and rest requirements for flight crew members to ensure the safety of flight operations. It sets standards for how long a flight crew can be on duty, the required rest periods, and the conditions under which these regulations apply.

Understanding Part 117 is crucial for maintaining safety in aviation operations, as fatigue can significantly impair a pilot's performance. The regulation is designed to prevent scenarios where pilots may be unable to perform their duties effectively due to inadequate rest.

The other parts mentioned have different focuses: FAR Part 61 governs the certification of pilots and flight instructors, FAR Part 91 lays out general operating and flight rules but does not specifically address crew rest requirements, and FAR Part 43 covers maintenance, preventive maintenance, rebuilding, and alteration of aircraft, which is unrelated to crew duty and rest regulations.