Adoption of new Special Conditions in relation to Airworthiness of Part 21 aircraft

Closed 2 Feb 2024

Opened 5 Jan 2024

Feedback updated 17 Apr 2024

We asked

We asked for feedback on the CAA’s position on the adoption of 21 Special Conditions and 2 Means of Compliance, published by the European Aviation Safety Agency (EASA) after the United Kingdom left the European Aviation regulatory system.

You said

We received 5 responses in total. All respondents agreed with the CAA approach to adopt the Special Conditions and Means of Compliance listed in the consultation. There were no comments on the technical content of the Special Conditions or Means of Compliance.

We did

We acknowledge that all respondents supported this proposal, however we are also aware of the limited number of responses. The Special Conditions and Means of Compliance will be adopted and published on the CAA website in due course.


A Decision was taken by the CAA to adopt all airworthiness Special Conditions (SC) published by EASA on or before 31 December 2020. A number of SC and associated Means of Compliance were published by EASA after that date, which due to its step-by-step decision-making process were in draft form prior to 31 December 2020 or had at least in part been substantially formed or considered (eg through preliminary Opinions, Notice of Proposed Amendments, Rulemaking Task discussions). CAA experts contributed to these earlier documents and discussions, upon which the final published SC have been based.

The CAA intends to introduce into its regulatory framework the Special Conditions developed and published by EASA on or after 1 January 2021. Your feedback will help us to better understand the potential issues or improvements before we finalise these.

What are Special Conditions?

Special Conditions are detailed technical specifications prescribed by the CAA for a product where the related current Certification Specifications (CS) do not contain adequate or appropriate safety standards for that product. This is usually because the product has novel or unusual design features relative to the design practices on which the applicable CS are based.

Special Conditions are developed to provide further direction to OEMs on how these safety requirements can be met.

This consultation

The CAA is consulting on the approach to adopt EASA Special Conditions at their latest version, consisting of the following documents.

Published by end of 2021

Published by the end of 2022

Published between January and October 2023

Why your views matter

It is important to the CAA that everyone has an opportunity to voice their opinion on matters that could affect them. There is also a legal requirement to consult when creating detailed specifications and guidance material, due to the legal status of these documents.

We welcome comments from every sector of the community. This includes the general public, government agencies and all sectors of the aviation industry, whether as an aviator, aviation consumer and/or provider of related products and services.

How to respond

This consultation will close on 2 February 2024.

We cannot take into account comments received after this date. We will assume that all responses can be published once the consultation has closed. There is an option to request for your name to remain private, but in any event your email address will never be published.

What happens next

At the end of the response period, we will review your comments and submissions and publish the results. Your feedback will be considered during the development of the regulatory changes.


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