AMC1 21L.A.85 Demonstration of compliance

• ED Decision 2023/013/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

AMC1 21L.A.85 Demonstration of compliance ED Decision 2023/013/R DEMONSTRATION OF COMPLIANCE FOR A SUPPLEMENTAL TYPE CERTIFICATE The description of the design change should include an explanation of the purpose of the change, the pre-modification and post-modification configuration(s) of the product, schematics/pictures, and any other detailed features and boundaries of the physical change (this may be supplemented by drawings or outlines of the design, if this helps to understand the design change), as well as the identification of the changes in areas of the product that are functionally affected by the change, and the identification of any changes to the approved manuals. The applicant should identify any reinvestigations that are necessary to demonstrate compliance. This is a list of any affected items of the applicable certification basis for which a new demonstration is necessary, together with the means (e.g. calculation, test or analysis) by which it is proposed to demonstrate compliance. (a)     Compliance documentation for the demonstration of compliance under point [21L.A.85](#_DxCrossRefBm1649097917)(a) comprises one or more test or inspection programmes/plans, reports, drawings, design data, specifications, calculations, analyses, etc., and provides a record of the means by which compliance with the applicable type-certification basis and environmental protection requirements is demonstrated. (b)     Each compliance document should typically contain: —        the reference of the certification specifications, special conditions or environmental protection requirements addressed by the document; —        substantiation data demonstrating compliance (except test or inspection programmes/plans); —        a statement by the applicant declaring that the document provides the proof of compliance for which it has been created; and —        the appropriate authorised signature. (c)      Each compliance document should be unequivocally identified by its reference and issue date. The various issues of a document should be controlled and comply with point [21L.A.7](#_DxCrossRefBm1649097744). The level of detail of the compliance documentation that is referred to in point [21L.A.85](#_DxCrossRefBm1649097917)(a) should be the same regardless of whether the change is approved by EASA or under a design organisation approval (DOA) privilege, to allow the change to be assessed in the frame of the DOA surveillance. For major changes (STCs) approved by a design organisation approval (DOA) holder on the basis of its privileges as per point [21.A.263](#_DxCrossRefBm1649096918)(c)(8) of Annex I (Part 21), the process described in [AMC No 2 to 21.A.263(c)(5), (8) and (9)](#_DxCrossRefBm1649097059) applies. ##### AMC1 21L.A.85 Demonstration of compliance *ED Decision 2023/013/R* **DEMONSTRATION OF COMPLIANCE FOR A SUPPLEMENTAL TYPE CERTIFICATE** The description of the design change should include an explanation of the purpose of the change, the pre-modification and post-modification configuration(s) of the product, schematics/pictures, and any other detailed features and boundaries of the physical change (this may be supplemented by drawings or outlines of the design, if this helps to understand the design change), as well as the identification of the changes in areas of the product that are functionally affected by the change, and the identification of any changes to the approved manuals. The applicant should identify any reinvestigations that are necessary to demonstrate compliance. This is a list of any affected items of the applicable certification basis for which a new demonstration is necessary, together with the means (e.g. calculation, test or analysis) by which it is proposed to demonstrate compliance. (a) Compliance documentation for the demonstration of compliance under point [21L.A.85](#_DxCrossRefBm485231413)(a) comprises one or more test or inspection programmes/plans, reports, drawings, design data, specifications, calculations, analyses, etc., and provides a record of the means by which compliance with the applicable type-certification basis and environmental protection requirements is demonstrated. (b) Each compliance document should typically contain: — the reference of the certification specifications, special conditions or environmental protection requirements addressed by the document; — substantiation data demonstrating compliance (except test or inspection programmes/plans); — a statement by the applicant declaring that the document provides the proof of compliance for which it has been created; and — the appropriate authorised signature. (c) Each compliance document should be unequivocally identified by its reference and issue date. The various issues of a document should be controlled and comply with point [21L.A.7](#_DxCrossRefBm485231240). The level of detail of the compliance documentation that is referred to in point [21L.A.85](#_DxCrossRefBm485231413)(a) should be the same regardless of whether the change is approved by EASA or under a design organisation approval (DOA) privilege, to allow the change to be assessed in the frame of the DOA surveillance. For major changes (STCs) approved by a design organisation approval (DOA) holder on the basis of its privileges as per point [21.A.263](#_DxCrossRefBm485230409)(c)(8) of Annex I (Part 21), the process described in [AMC No 2 to 21.A.263(c)(5), (8) and (9)](#_DxCrossRefBm485230550) applies.