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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.

The CAA will issue a Type Certificate (TC) or Restricted Type Certificate (RTC) for the approval of Products (aircraft, engine or propeller) for UK applicants.


Applicants for the TC or RTC must hold an appropriate design organisation approval such as:

  • Design Organisation Approval (DOA) in accordance with Part 21 Subpart J,
  • Alternative Procedures to DOA (ADOA) as per 21.A.14(b) for ELA2 aircraft, piston engines or propellers,
  • In the case of non-Part 21 aircraft (Annex 1) or engine/propeller, then a design organisation approval in accordance with BCAR A8-21.

In the case of an ELA1 aircraft (European Light Aircraft as defined in EU Reg 748/2012), or engine or propeller for an ELA1 aircraft, in the absence of an organisation approval, the applicant’s capability may be shown through the Certification Programme as per 21.A.15(b).

If DOA or ADOA is required, the scope of the type certification project must be within the approved scope and Terms of Approval (ToA) of the DOA/ADOA. Applications are also accepted in cases when the type certification project is simultaneously being used to demonstrate applicant competence for the issue of or extension to the scope or ToA of the DOA/DOA.

For more information on DOAs and ADOAs, see our guidance on how to apply for a Part 21 design organisation approval.

How to apply

An application is made using CAA Form SRG1726NR

Approval process (simplified)

x   Submit application on CAA Form SRG1726NR and provide the initial Certification Programme
  x Check eligibility of Applicant (to ensure that the project is within the DOA scope)
x   Provide Technical Familiarisation of the project
x   Provide initial Certification Programme
x x Review the Certification Programme
x x Agree the Certification Basis, Means of Compliance (MOC) and Level of Involvement (LOI)
x   Demonstrate compliance with airworthiness and environmental requirements
  x Determine compliance as per the agreed LOI and confirm with Applicant
x   Provide Declaration of Compliance
  x Compile Type Certificate Data Sheet (TCDS) and TCDS Noise (TCDSN)
  x Issue TC/RTC and publish TCDS/TCDSN