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This page provides information to applicants wishing to apply for a UK Part 21 Subpart G approval for the production of Part 21 aircraft and/or the products, parts and appliances fitted to them, under UK Regulation (EU) 748/2012.

Pre-requisites

How do I apply?

Complete and submit the online application form.

How much does it cost?

The cost for an application under Part 21 Subpart G depends on the rating(s) being applied for. Please refer to the Official Record Series 5 CAA Scheme of Charges for further information.

If the number of hours taken by the Civil Aviation Authority (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 bank transfer or by a cheque made payable to the Civil Aviation Authority. Further details are available for making a payment.

When using bank transfer, you will need to identify what the payment is for by including your approval reference and receiving department.

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What do I need to send with my application?


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


  • Correctly completed applications will be processed, acknowledged and passed to Airworthiness for investigation within 10 working days.
  • When the Organisation Approvals team receive the recommendation from Airworthiness confirming the organisation has achieved the required standard, the approval certificates will be raised and sent to your organisation within 20 working days.

Same day services

Same day, special delivery and other customised services are available at an additional cost. This service is on request, which should be made at the time of initial application. Documents are worked to a same day turnaround from receipt of customer request by 11:00 to completion of the processing of the application by 16:30 on the same working day. The customer will be able to collect the documents by 16:30 on the same day or the documents shall be sent by Royal Mail special delivery, where this is included in the service.

The Civil Aviation Authority (CAA) has developed the same day, special delivery and other customised services charges to include additional products and areas.

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What happens next?

  • An automated email receipt following submission of the online application form.
  • An email to confirm your provisional Part 21 approval number - normally within 10 working days.
  • An initial assessment of your application and POE will be carried out and we will contact you with any queries.
  • The Resource Scheduling Team will contact you to arrange for a surveyor to carry out the on-site audit.
  • Any questions regarding the scheduling of your on-site visit can be directed to the Resource Scheduling Team at ResourceScheduling@caa.co.uk.
  • An Airworthiness Surveyor will review the documents submitted with the application and if satisfactory, will conduct an audit against the requirements and raise an audit report detailing any findings.
  • The surveyor will review the nominated personnel, interviews for key personnel may be carried out.
  • If findings have been raised the organisation should address the findings and notify the surveyor of the actions taken.
  • Once the audit findings relating to the initial application have been closed and when the surveyor is able to, a recommendation for the issue of the approval will be forwarded to the Shared Services Approvals team.
  • When the Approvals team receive the recommendation the approval certificates will be raised and sent to your organisation within 20 working days.
  • On receipt of the certificates, your organisation can begin undertaking and releasing work once you receive the certificates.
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How long is it valid for?


  • Approvals remain valid unless cancelled, suspended or revoked.
  • Once granted an approval requires a recommendation for continuation every 24 months from the date of issue, this is raised by the CAA Surveyor following a satisfactory audit programme.
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