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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.



The UK’s exit from the EU and EASA has changed engineering licensing requirements, particularly in relation to what licences are needed to certify a UK registered aircraft from the 1 January 2023.

Maintenance organisations and aircraft engineers are reminded that:

  • For a maintenance organisation based in the UK, certifying a UK registered aircraft, an EASA Part 66 licence is no longer acceptable.
  • For a maintenance organisation based in the UK, certifying a UK registered aircraft, an EASA Part 66 licence is no longer acceptable as the basis of a UK Part 145 maintenance organisation authorisation issued under UK.145.35 (b).
  • Organisations may continue to use EASA Part 66 staff within the EU if the supporting Part 145 qualifies them as per Appendix IV - to 145.A.30(j)(2)).

All Licensed Aircraft Engineers (Part 66) will be required to hold a CAA issued Part 66 Licence to continue to certify in the UK and maintain UK registered aircraft from 1 January 2023.

Applications for transfer from EU to UK Part 66 must be submitted to ELDWEB@caa.co.uk no later than 31 December 2022.

A person who applies for a UK licence up until 31 December 2022 cannot exercise the privileges of that licence to certify UK registered aircraft until the UK Part 66 licence has been issued by the UK CAA and that licence has been received and signed by the individual.