A Part 91 operation is defined by Federal Aviation Administration (FAA) regulations for civil aircraft operations in the United States. These rules apply to non-commercial flights and are commonly referred to as “general operating and flight rules.”
Regulations provide guidelines for operating aircraft safely and efficiently, such as airworthiness, maintenance requirements, flight planning, weather minimums, pilot qualifications and more. Part 91 operations pertain to private non-commercial flights which may be utilized by individuals or companies for personal or business travel.
Part 91 operations require pilots to hold appropriate licenses and ratings, the aircraft to be regularly maintained and inspected, as well as compliance with airspace and traffic control regulations. Furthermore, Part 91 pilots must follow certain procedures related to flight planning, fuel requirements, and weather conditions among others.
In conclusion, Part 91 operations are a set of regulations that establish minimum safety and efficiency standards for non-commercial aircraft operations in the United States.