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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.

UK Technical Standard Authorisations (UKTSOAs) are issued to ratify stand-alone approvals of articles (equipment).

These authorisations are not to be construed as an approval to install the equipment on an aircraft, but credit may be claimed from the equipment authorisation towards the showing of compliance with the aircraft Certification Specifications (CS) when certificating their installation.

The UK left the European Union aviation system on 31 December 2020, and as such is no longer part of European Union aviation institutions, including the European Union Aviation Safety Agency (EASA).

EASA Technical Standard Order Authorisations (EASA TSOAs) valid up to this date are considered approved by the CAA and have not been published on the CAA website. Consult the TSOA holder for information on these design approvals.

Going forward, the equipment approvals issued by the CAA using UK CS-ETSO will be UKTSOAs and will be published on this page.