What does 14 CFR Part 91 govern?

14 CFR Part 91 governs general operating and flight rules for all aircraft, which primarily includes general aviation, private flights, and non-commercial operations. While it covers various aspects of aviation operations that can relate to private flights, it specifically details the regulations that govern the conduct of all flights that are not for hire or commercial purposes. This encompasses rules regarding aircraft maintenance, pilot certification, and operational limitations, distinguishing itself from the regulations that apply specifically to commercial air transport or airport operations.

In this context, private flights are a subset of general aviation flights under the umbrella of 14 CFR Part 91, focusing on the regulations that ensure safety and compliance within these non-commercial aviation activities.