Which regulation allows a private pilot to perform preventative maintenance?

The regulation that allows a private pilot to perform preventative maintenance is found in 14 CFR Part 43.3. This regulation outlines the specific maintenance tasks that can be carried out by a pilot who holds at least a private pilot certificate. Preventative maintenance includes activities that are limited in nature, such as replacing a flat tire, adding oil, or cleaning or replacing spark plugs, and the regulation provides the necessary guidance to ensure safety while permitting pilots to carry out minor maintenance on their own aircraft.

Other regulations mentioned in the choices serve different purposes. For example, Part 45 deals primarily with the identification and registration marking of aircraft, while Part 91 covers general operating and flight rules, including responsibilities of pilots but does not specify maintenance tasks. Part 61 outlines the certification of pilots and flight instructors, including the requirements for obtaining various ratings and certificates. Thus, while all these regulations are essential for various aspects of aviation, 14 CFR Part 43.3 specifically addresses the capacity in which a private pilot can engage in preventative maintenance.