How does FAR 25 relate to CS 25?

FAR 25 and CS 25 are closely related as they both provide airworthiness standards for transport category airplanes, albeit in different jurisdictions. FAR 25 is the Federal Aviation Regulation in the United States, while CS 25 refers to the Certification Specifications established by the European Union Aviation Safety Agency (EASA). Both sets of regulations aim to ensure that aircraft are safe and meet performance criteria, effectively mirroring each other in terms of the core principles and requirements.

This alignment allows for a degree of consistency in airworthiness standards across the Atlantic, which is vital for international aviation operations. While FAR 23 pertains to small airplanes, FAR 25 and CS 25 address larger, transport category aircraft, ensuring that safety standards remain robust for various aircraft types. The similarities between FAR 25 and CS 25 facilitate easier compliance for manufacturers operating in both the U.S. and European markets, promoting safety and interoperability.