FAQ.
MODIFICATIONS & REPAIRS
EASA DOA.21J.749 / EASA POA 21G
EASA DOA.21J.749 / EASA POA 21G
AERONAUTICAL CERTIFICATION
FREQUENTLY ASKED QUESTIONS
FREQUENTLY ASKED QUESTIONS
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What is a Design Organisation Approval (DOA)?
A Design Organisation Approval (DOA) is an EASA approval granted to an organisation demonstrating that it has the organisation, procedures, competencies and resources necessary to perform design activities in accordance with Part-21. A DOA holder may be responsible for the design of aircraft, changes to aircraft, repairs, parts and appliances, depending on the scope of its approval. The DOA framework establishes a formal Design Assurance System and provides the organisation with defined responsibilities and, where applicable, privileges for conducting certain design and certification activities. For certification projects, the DOA plays a central role in ensuring that the design complies with the applicable certification requirements and that the corresponding compliance demonstration is properly controlled and documented. |
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What is a Production Organisation Approval (POA)?
A Production Organisation Approval (POA) is an EASA approval granted to an organisation demonstrating its capability to produce aeronautical products, parts and appliances in conformity with approved design data and applicable requirements. The POA framework addresses the organisation's production system, procedures, facilities, personnel, resources and quality-related processes. The purpose of a POA is to provide assurance that products and components are consistently produced in accordance with the approved design and are in a condition for safe operation. The DOA and POA frameworks are therefore complementary: the DOA is primarily concerned with the design and demonstration of compliance, while the POA addresses production conformity and the controlled manufacture of the approved design. |
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What is a major change?
A major change is a change to an approved type design that has an appreciable effect on the overall level of safety or other characteristics relevant to the applicable certification requirements. The classification of a change as major or minor is important because it determines the applicable certification and approval process. For a major change, the applicant must establish the applicable Certification Basis and demonstrate compliance with the affected requirements. Depending on the circumstances and the applicant's approval privileges, the change may be approved by EASA or by an appropriately approved Design Organisation exercising its privileges. |
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What is a minor change?
A minor change is a change to an approved type design that is not classified as a major change. Although the certification process for a minor change is generally less extensive than for a major change, compliance with the applicable requirements must still be demonstrated. The applicable Certification Basis is established for the change, and the required compliance demonstration and documentation must be completed in accordance with the applicable Part-21 requirements and the organisation's approved procedures. Minor changes may, under the applicable conditions, be approved under the privileges of an appropriately approved Design Organisation. |
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What is an ETSO authorisation?
A European Technical Standard Order (ETSO) Authorisation is an EASA approval allowing an article to be produced and used as an approved aeronautical article in accordance with the applicable ETSO requirements. ETSO defines minimum performance standards for specified articles. An applicant seeking an ETSO Authorisation must demonstrate compliance with the applicable ETSO requirements and any associated regulatory provisions. The certification process typically involves establishing a Certification Programme, defining the applicable Means of Compliance, conducting the required compliance activities and providing the necessary compliance documentation. An ETSO Authorisation concerns the article itself and does not, by itself, constitute approval for the installation of that article on a particular aircraft. |
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What is a Certification Specification (CS)?
A Certification Specification (CS) is a technical specification issued by EASA containing detailed airworthiness or environmental protection requirements applicable to specific categories of aeronautical products or activities. Examples include CS-23 for certain aeroplanes, CS-25 for large aeroplanes, CS-27 and CS-29 for rotorcraft, CS-E for engines, CS-P for propellers and CS-ETSO for European Technical Standard Orders. The applicable CS, including the relevant amendment level, forms part of the regulatory framework used to establish the Certification Basis for a certification project. |
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How can R&R supports an aeronautical certification project?
R&R supports aeronautical organisations in planning, managing and executing certification activities within the applicable regulatory framework. Our support can cover the complete certification lifecycle, including:
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