Which aircraft operating within the U.S. are subject to CFR part 91?

CFR part 91, which stands for Title 14 of the Code of Federal Regulations, specifically governs the operation of all civil aircraft in the United States. It outlines various rules and regulations related to the operation, maintenance, and general conduct of aircraft. This includes everything from pre-flight inspection protocols to passenger safety measures, and pilot certification standards.

The regulation is applicable to all types of civil aircraft regardless of their specific classification, which encompasses everything from private planes to commercial airliners. Additionally, even military aircraft often have to follow certain provisions of part 91 when operating in controlled airspace or under specific conditions, although they are primarily governed by separate military regulations.

This broad applicability of CFR part 91 to all aircraft ensures a uniform standard for safety and operational efficiency across the aviation sector, making it crucial for all operators to be familiar with these regulations.