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.



This page provides information to organisations based in United States of America (USA), wishing to make a change an existing UK Part 145 approval based on a change to their Federal Aviation Administration (FAA) 14 CFR 145 repair station certificate.

How do I apply?



Complete the Part 145 Approved Maintenance Organisation application (SRG1783) and submit it to the supervising Flight Standards District Office (FSDO) at the same time as the Federal Aviation Administration (FAA) application for amendment to the 14 CFR Part 145 certificate is made.

Refer to Section B of the Maintenance Agreement Guidance (MAG) (CAP1780MAG) for further information.

Close How do I apply?

How much does it cost?



The current cost of a change to an existing UK Part 145 approval based on a change to the organisations FAR 145 Repair Station Certificate is £138.

  • The fee is only payable in Pounds Sterling.
  • Payment by credit card is immediate.
  • Payments can be made by BACS, however any bank charges must be covered by your organisation.

Please refer to the making a payment page for further details.

Following the issue or amendment to a UK Part 145 approval, organisations will need to pay an annual fee for the approval to remain valid. Currently the annual fee is £646.

In the event of a discrepancy between the information on this page 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.

Close How much does it cost?

What do I need to send with my application?



The organisation will need to send the following to their Federal Aviation Administration (FAA) supervising Flight Standards District Office (FSDO):

Close What do I need to send with my application?

What else do I need to know?



An application for a change to a UK Part 145 approval certificate will need to be made for any of the following changes to the Federal Aviation Administration (FAA) repair station certificate:

  • A change of name, including a change to the ‘doing business as’ name.
  • A change of the address of the fixed location of the facility (this does not include the mailing address).
  • A change of the repair station certificate number.

An application will also need to be made for any of the following changes, but such changes will not result in an amendment to the UK Part 145 approval certificate:

  • A change in Accountable Manager
  • Additional fixed locations
  • Additional line stations
  • A change in ratings

Full details of changes requiring an application can be found in Section B, paragraph 4 of Maintenance Agreement Guidance (CAP1780MAG).

The FAA will inform the Civil Aviation Authority (CAA) of the proposed change by email within 10 working days of the application being received.

Following the satisfactory outcome of any required audit by the FAA, the FAA shall recommend acceptance of the changes to the (UK) Part-145 approval.

Close What else do I need to know?

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



When a positive recommendation for a change to the approval has been received from the Federal Aviation Administration (FAA), the new approval certificate will be raised and sent to your organisation within 10 working days.

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

What happens next?



The information below provides guidance on what to expect during the process:

The Federal Aviation Administration (FAA) will review the application form and document package, carry out any audits as necessary, and when satisfactory, make a recommendation to the Civil Aviation Authority (CAA) to issue the approval.

Upon receipt of a completed recommendation from the FAA, the CAA shall review the application for compliance with the Maintenance Implementation Procedures (MIP) and Maintenance Agreement Guidance (MAG). When satisfied with the contents of the application, the CAA will issue a revised certificate to the repair station. The CAA will also send a copy to the FAA and update the CAA website.

Close What happens next?

How long is it valid for?



Once granted, a UK Part 145 approval requires a recommendation for continuation of the approval every 24 months from the date of initial issue. This is raised by the Federal Aviation Administration (FAA) and sent to the Civil Aviation Authority (CAA) following a satisfactory audit programme.

Close How long is it valid for?

News from UK Civil Aviation Authority

  1. UK regulator unveils new AI strategy
  2. UK to bring aviation experts together for third legal summit
  3. UK Civil Aviation Authority approves Manchester Low-Level Route airspace change