Which part of the FARs covers the rules for airworthiness requirements?

Part 23 of the Federal Aviation Regulations (FARs) pertains specifically to the airworthiness standards for normal category airplanes. This section establishes criteria for design, performance, and safety that must be met in order for an aircraft to be considered airworthy. It addresses various aspects including structural integrity, flight characteristics, and equipment requirements, ensuring that the aircraft can operate safely within its intended envelope.

The standards set forth in Part 23 are critical for manufacturers and operators, as they ensure that aircraft are constructed and maintained to a level that ensures the safety of flight operations. By focusing on design and performance, Part 23 plays a vital role in the regulation of civil aviation in the United States, thereby fostering a culture of safety within the aviation community.

Other parts mentioned do not address airworthiness requirements in the same comprehensive manner: Part 45 deals with identification and registration markings; Part 61 covers certification of pilots and flight instructors; and Part 75 pertains to operating rules for carriers. Each of these parts serves different purposes within the FAR framework but does not directly set the airworthiness standards as Part 23 does.