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UK – EU Transition, and UK Civil Aviation Regulations

To access current UK civil aviation regulations, including AMC and GM, CAA regulatory documents, please use this link to UK Regulation. Please note, if you use information and guidance under the Headings below, the references to EU regulations or EU websites in our guidance will not be an accurate information or description of your obligations under UK law. These pages are undergoing reviews and updates.

Letters to Owners and Operators (LTOs) were issued by the CAA to owners and operators of aircraft on the UK register.

They generally contain information relating to a variety of technical issues, for example, reminders of forthcoming requirements or clarification of the interpretation of Airworthiness Directives.

LTOs are not mandatory in themselves; however, they may contain significant airworthiness information received from a foreign Aviation Authority or refer to a rule or regulation that is mandatory. The following are still current, however we no longer issue LTOs, we now issue Safety Notices.

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