Apply for an EASA Part 145 Approval

Guidance for maintenance organisations


Regulation EC 2042/2003 details the rules for the continuing airworthiness and maintenance of aircraft subject to EASA regulation. Part-145 of this Regulation concerns the maintenance of EASA aircraft and components primarily used for commercial air transport purposes as well as those defined in the regulation as ‘large aircraft’


  • Organisations should be located in the UK
    (Organisations located outside the UK, including those based in the Channel Islands, should apply directly to EASA).


See the Official Record Series 5, CAA Scheme of Charges

If you apply for an initial approval with multiple ratings under the same approval type, you must include a payment relating to the charge for the highest rating applied for e.g. a Part 145 application for ratings A2, A3 and B1 would attract a single charge for the highest rating, being the B1, as per the Scheme of 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.


Processing time (On receipt of all required information)

See the section below titled 'What to Expect'

Validity period

Once granted a Part 145 approval requires a recommendation for continuation every 24 months from date of initial issue. This is raised by the CAA Surveyor following a satisfactory audit programme.

Associated Rules, Regulations and Forms

You will need to provide

  • A completed application form submitted by an Authorised Representative of the Company e.g. the proposed Accountable Manager.

     (Aircraft ratings should be listed as per EASA Part-66 Appendix 1 listing. At this time the Part 66 listing does not include Sailplanes, Powered Sailplanes or Balloons.  In this case use the aircraft type designation specified on the Type Certificate Data Sheet.) 
  • A minimum of one EASA Form 4 for key personnel i.e. Quality Manager. Additional Form 4’s may be requested by your allocated CAA surveyor. 
  • A draft copy of the Maintenance Organisation Exposition (MOE)
  • A draft copy of the Capability List if not included within the (MOE)
  • Copy of the company Certificate of Incorporation if your organisation is trading as a registered company
  • Payment of the relevant fee

See also: 

How to apply

What to expect

  • An automated email receipt following submission of your Online application form. 
  • An e-mail to confirm your provisional Part 145 approval number normally within 10 working days.
  • A Technical Support Officer will make an initial assessment of your MOE and application and will contact you with any queries
  • The CAA Resource Management Team will contact you to arrange for a Surveyor to carry out an on-site audit
  • Any questions regarding the scheduling of your on site visit can be directed to the Resource Management Team at 01293 573600.
  • An Airworthiness Surveyor will conduct an audit against the requirements and any audit findings will be raised in an audit report.
  • The Airworthiness Surveyor will review the nominated personnel. Interviews for key personnel may be carried out.
  • If findings have been raised, the organisation should address all the findings and notify the Surveyor of the actions taken
  • Once any audit findings relating to the initial application have been closed the Airworthiness Surveyor will submit a recommendation to A & A for the issue of the approval.
  • When A&A receive the recommendation the approval certificates will be raised and sent to your organisation within 20 working days
  • Your organisation can begin undertaking and releasing work once you receive the certificates.

Contact us


Applications and Approvals
Civil Aviation Authority
Aviation House
Gatwick Airport South
West Sussex
Telephone: 01293 768374 (open 8.30am to 4.30pm)