As part of this preparation, the CAA will now accept Design Organisation applications from organisations with their principal place of business located within the UK. Part subpart J of this regulation concerns the Design of aircraft or the associated components. Pre-requisites Who should apply? Design organisations should have their principal place of business located in the UK. Organisations with their principal place of business located outside the UK, including the Channel Islands, should apply directly to their local national airworthiness authority Organisations needing to change a Registered Company or Limited Liability Partnership LLP Number will require a new initial approval as it cannot be classed as a change to an existing approval.

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At the beginning of each product lifecycle is the design phase, which serves to turn an idea into a marketable product. After market introduction, design activities will once again play a role in case of modifications, refurbishment or major repairs to the original product. Design activities in the aerospace industry are unique, since they are subject to exceptional control and surveillance by legislation and aviation authorities.

Strict specifications for the design of the product as well as for the company organization and staff qualification should ensure that appropriate attention is paid to safety and reliability during design phase. Design organisations in the sense of the EASA are thereby all enterprises, which develop aeronautical products, parts and appliances, define changes or repair procedures at these. For such activities, organisations must have demonstrated their qualifications to their responsible aviation authority.

Regulatory monitoring of design organisations is carried out by EASA. The core activities of design organisations include: the preparation of design documentation for aeronautical products or changes thereto and the development of repair procedures on such, the identification, assignment and interpretation of Certification Specification CS and environmental protection regulations, the verification that the design is safe and meets the airworthiness requirements of the Certification Specification, the preparation of operating manuals and maintenance specifications manuals , the preparation and application for official design approvals Type Certification, Supplemental Type Certification or Repair Approvals.

The company must have sufficient personnel in terms of quantity and qualification to carry out the planned design activities. Organisational facilities and equipment must enable the employees to carry out their work.

In addition to design offices, access to test laboratories and prototyping facilities for showing of compliance must be ensured. The organization must enable full and effective collaboration between and within the departments. The Organisation must have a handbook that defines and describes its structure, processes and responsibilities.

All design activities must be covered by the scope of approval. Do you need aeronautical support? We support you! These are repeated at regular intervals to ensure that the organisation can maintain the approval requirements over time.

In these surveillance audits, compliance with aviation legisaltion is checked on a random basis. Both before initial approval and during operation, the risk is usually less that individual approval requirements are not met in their entirety, but that they are not fully met. Common deficits in the fulfillment of approval requirements are: Procedures are not described clearly, the documented procedures are not sufficiently or not completely known to the employees, individual employees do not have the required scope of authorization.

Before this is not completed, an aircraft may not be allowed to operate, or individual products may not be installed in an aircraft. At the beginning of a design process is the preparation of a general description or specification.

On this basis, the planned activities should be classified according to their scope and complexity. A distinction is made between the design categories minor and major.

Following this classification of the design activity, the certification program CP is defined. The CP forms the basis of the typ certification process. In a first step, the applicable Certification Specifications must be identified. The applicability of a Certification Specifications and its showing of compliance for example by means of tests or calculations for the individual case is not always clear, so that it needs interpretation.

The following process step, the showing of compliance, is to examine and justify correspondence of the design with the identified Certification Specifications. EASA checks every major design project during the verification of compliance with the Certification Specifications, regardless of whether it is a completely new aircraft or just a modification. Once all evidence has been provided and the sample examination has been successfully completed, the EASA Agency issues the type certificate.

This specifies minimum requirements for the performance level or characteristic of the affected products, which are defined in associated Certification Specifications CS-ETSO. Typical components subject to the ETSO standard are e. Thereafter, an ETSO approval can be applied by any company that demonstrates the necessary design practice and resources for the product. Prerequisite for a specific product approval by EASA is the submission of comprehensive information regarding design and performance characteristics DDP — Declaration of Design and Performance.

Would you like more information about the approval or production of ETSO products? These CS specify the future design of products while also defining how its airworthiness is demonstrated. In principle, however, divergent terminology used for the interpretation material must be taken into account. Would you like more information on Certification Specifications?


EASA Part 21 & CAR 21 Subpart G & J Regulatory Framework – 3 Days



Design Organisations Approvals


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