Which CFR part contains the general operating and flight rules for civil aviation?

• A. 14 CFR Part 21
• B. 14 CFR Part 39
• C. 14 CFR Part 43
• D. 14 CFR Part 91

Answer: (D)

Part 91 contains the general operating and flight rules for civil aviation. It sets the baseline for how aircraft are operated in the U.S., covering things like flight rules (VFR and IFR), the responsibilities of the pilot in command, basic operating requirements, right-of-way, and other fundamental safety practices that govern everyday flying. This is separate from other parts that handle different topics: certification and airworthiness of aircraft and parts are in the section on certification (Part 21), mandatory actions to address unsafe conditions are in Airworthiness Directives (Part 39), and the rules for maintaining aircraft are in Maintenance, Preventive Maintenance, Rebuilding, and Alterations (Part 43).