EASA is preparing a change to the rules for design and production to make them become risk based. Check out the latest update provided at AERO 2023 in the attached presentation.
The main objective is enable the application of a proportionate approach to certification for products that are considered to pose less risk when compared to other, more complex products.
There are two main processes. A light certified process that leads to an EASA Type Certificate and a Certificate of Airworthiness. There is also a declared process that leads to a declaration of design compliance and a restricted Certificate of Airworthiness. The presentation below provides an overview of how Part 21 Light applies to both Light Declared Aircraft and Light Certified Aircraft, covering everything from aircraft to gilders/ sailplanes, balloons, airships and also rotorcraft/ helicopters. You can find more details on each process in the PowerPoint.
The timeline for the implementation of Part 21 Light is shown below.

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