What must the type design consist of according to Regulation (EU) 2024/1108?

The type design must consist of: (1) drawings and specifications, and a listing of those drawings and specifications, necessary to define the configuration and design features of the product, UAS or CMU shown to comply with the applicable type-certification basis and environmental protection requirements; (2) information on materials, processes, methods of manufacture and assembly of the product and CMU necessary to ensure conformity; (3) an approved airworthiness limitations section of the instructions for continued airworthiness as defined by the applicable certification specifications; and (4) any other data that allows by comparison the determination of the airworthiness and, if relevant, environmental characteristics of later products and CMUs of the same type.

What does 'adequately identified' mean for a type design?

The section states that each type design shall be adequately identified, but does not specify further details.

21.A.31 Type design

Q: What is the purpose of the drawings and specifications listed in the type design?

They are necessary to define the configuration and the design features of the product, the UAS or the CMU shown to comply with the applicable type-certification basis and environmental protection requirements.

Q: What information about materials and processes must be included in the type design?

Information on the materials and processes and on the methods of manufacture and assembly of the product and the CMU necessary to ensure the conformity of the product and the CMU.

Q: What is the role of the airworthiness limitations section in the type design?

It must be an approved airworthiness limitations section of the instructions for continued airworthiness as defined by the applicable certification specifications.

Q: What kind of additional data may be part of the type design to support later products of the same type?

Any other data that allows by comparison the determination of the airworthiness and, if relevant, the environmental characteristics of later products and CMUs of the same type.

Q: Does the type design need to include a listing of drawings and specifications?

Yes, the type design must include a listing of those drawings and specifications necessary to define the configuration and design features.

Q: What is the purpose of the information on methods of manufacture and assembly in the type design?

It is necessary to ensure the conformity of the product and the CMU.

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21.A.31 Type design

Regulation (EU) 2024/1108

(a) The type design shall consist of:

1. the drawings and specifications, and a listing of those drawings and specifications, necessary to define the configuration and the design features of the product, the UAS or the CMU shown to comply with the applicable type-certification basis and environmental protection requirements;

2. information on the materials and processes and on the methods of manufacture and assembly of the product and the CMU necessary to ensure the conformity of the product and the CMU;

3. an approved airworthiness limitations section of the instructions for continued airworthiness as defined by the applicable certification specifications; and

4. any other data that allows by comparison the determination of the airworthiness and, if relevant, the environmental characteristics of later products andCMUs of the same type.

(b) Each type design shall be adequately identified.

Details

Source-Title: 21.A.31 Type design View latest amendments

Erulesid: ERULES-1963177438-3683 Compare versions

Domain: Initial airworthiness

Applicabilitydate: 1 May, 2025

Entryintoforcedate: 12 June, 2024

Regulatorysource: Regulation (EU) 2024/1108 Navigate

Regulatorysubject: Part-21

Typeofcontent: DR (Delegated rule)

Origin: EASA

Category: EAR