We use necessary cookies to make our website work. We'd also like to use optional cookies to understand how you use it, and to help us improve it.

For more information, please read our cookie policy.

Bilateral agreements

The CAA, as an independent regulator, negotiates and enters into bilateral safety arrangements with other National Aviation Authorities (NAA).

Bilateral agreements and arrangements allow the airworthiness certification of civil aeronautical products to be shared between two countries.

A Bilateral Aviation Safety Agreement (BASA), Memorandum of Understanding (MoU) or Working Arrangement (WA) and their associated implementing procedures provide for technical cooperation between national civil aviation authorities. They help reduce duplication of activity and aim for mutual acceptance of certificates.

In addition to airworthiness certification, BASAs, MoUs and WAs provide for bilateral cooperation across other areas of aviation, including maintenance, flight operations, and environmental certification.

For aircraft certification and maintenance, additional implementation procedures will cover specific issues such as design approval, production acceptance, export airworthiness approval, post-design approval activities, technical cooperation and maintenance.

Bilateral arrangements and agreements survey results 2023

The opinion and feedback of the UK aviation community is valuable to us and we want to better understand how you interact with third countries and international markets.

Thank you to those who took the time to complete our survey. We have now published the results.

United States of America

Special Arrangement: Continuity of Aircraft Projects

The Special Arrangement enabled the continuity and simplified conclusion of design certification validation projects that had started with EASA and the FAA before the UK’s exit from the EU. Approximately 30 projects have benefitted from this process.

The Special Arrangement will end on 1 January 2023. From that date, the provisions of the Special Arrangement will no longer be available; validation projects must follow the processes set out in the Implementation Procedures for Airworthiness (IPA) established between the CAA and the FAA.
Applications for validation under the terms of the Special Arrangement must be submitted by 31 December 2022.

Close United States of America