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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, 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.

EU exit

Please note that, in the event of UK participation in EASA and mutual recognition of licences and certificates ceasing, some CAA website content and application forms may continue to carry the EASA logo or reference the EU or EASA rather than the UK CAA in the short term.

These will be updated in due course following the outcome of the transition period negotiations on the long-term aviation relationship between the UK and the EU. In the meantime, the guidance provided and the application forms accessed via the CAA website portal will continue to be valid

Maintenance Organisations may hold an approval from the Federal Aviation Administration (FAA) to maintain aircraft or components for aircraft that are registered in the United States of America. A Bilateral Agreement between the UK and the USA was signed on 20 December 1995. The Agreement means that the UK CAA will undertake the oversight of organisations that hold UK Part 145 approval and FAR 145 Repair Station Certification.


Organisations must hold a valid UK Part 145 approval.
Changes that affect the FAA Certificate and/or OpSpecs, as detailed within the Maintenance Agreement Guidance, a formal FAA application is required. (The FAA Certificate and/or OpSpecs will not exceed the ratings or scope of work under your Part 145 approval).

How much does it cost?

  • The charge for A1.B1 ratings is £1,183
  • The charge of A2/B2/B3/C/D ratings is £538

The FAA Certificate and/or OpSpecs will not exceed the ratings or scope of work under your Part 145 approval. Therefore, you will also need to apply for a variation to your Part 145 approval (see: Change an Existing Part 145 Approval for further information and charges).

In the event of a discrepancy between the information here and the Official Record Series 5, CAA Scheme of Charges (Airworthiness, Noise Certification and Aircraft and Aircraft Engine Emissions), the Scheme of Charges takes precedence.

If the number of hours taken by the CAA to carry out its investigations in relation to the application exceeds the cost shown above, the applicant must pay an excess hourly charge. The CAA shall determine the excess hourly charge by taking the total number of excess hours taken by the CAA to complete the required investigations in relation to the application and multiplying that number of hours by an hourly charge. The balance for the excess hourly charge (total hourly charge less initial charge already paid) is payable by the applicant to the CAA and will be invoiced to the applicant.

Payments can be made by credit or debit card or by bank transfer.

How long will it take for my application to be processed?

We will confirm receipt of your application within 10 working days.

How long is it valid for?

Unless expired, revoked, suspended or cancelled FAR 145 Repair Station Certificates are valid for 12 months following initial approval and then valid for 24 months after the first renewal.

What else do I need to know?

  • FAA Form 8310-3 Application for Repair Station.
  • Repair Station Vital Information - the requirements are set out in the MAG.
  • Maintenance Annex Guidance (MAG).
  • What is a bilateral agreement (including a link to the MAG).
  • FAA website.
  • It is the organisation's responsibility to ensure that all the required data is provided so that the application can be processed without delay.
Close What else do I need to know?

What do I need to include with my application?

  • A completed online application form.
  • Relevant fee.
  • FAA Form 8310-3 Application for Repair Station for change.
  • Also have in progress an online application for the same change to be made to their UK Part 145 approval.
  • Draft Supplement to Maintenance Organisation Exposition (MOE).
  • Letter to confirm employees have received Hazardous Materials training or confirming that training is not required as no hazardous goods are carried.
  • Completed Repair Station Vital Information
Close What do I need to include with my application?

What happens next?

  • A&A will process the application pack and forward it to the local CAA regional office.
  • If the change is to housing / facility or location A&A will forward the FAA Form 8310-3 to the FAA.
  • A&A will confirm receipt of your application.
  • The regional office carries out a suitable investigation and raises any audit findings.
  • Organisation addresses the audit findings and sends response to the regional office.
  • The regional office will assess the proposed closures and when able to will close the audit findings.
  • When able to the regional office will make recommendation for the change to the Repair Station Certification and the UK Part 145 scope of Approval. This recommendation pack will be submitted to A&A.
  • A&A will assess the recommendation and issue the revised UK Part 145 Approval Certificate.
  • A&A will forward the recommendation to the FAA.
  • The FAA will review the recommendation and invoice the applicant for the issue of the revised Repair Station Certificate.
  • The applicant sends payment to the FAA.
  • FAA will issue a revised FAR 145 Repair Station Certificate and Ops Spec. Two copies will be sent to the applicant and a copy will be sent to A&A.
  • The applicant signs the FAR 145 Repair Station Certificate and Ops Spec and returns one copy to the FAA.
Close What happens next?

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