AMC 21.A.93(b) Certification programme for a change to a TC or an STC

• ED Decision 2019/018/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

AMC 21.A.93(b) Certification programme for a change to a TC or an STC ED Decision 2019/018/R The description of the 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. Guidance on areas that are changed and affected by the change is found in [GM 21.A.101](#_DxCrossRefBm1649097047), Section 3.9.1. Identification of reinvestigations referred to in point [21.A.93](#_DxCrossRefBm1649096851)(b)(2), necessary to demonstrate compliance, does not mean the demonstration of compliance itself, but the list of 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. Before submitting the application for a change, the analysis and classification activities of points [21.A.91](#_DxCrossRefBm1649096897) and [21.A.101](#_DxCrossRefBm1649096998) should be performed using the corresponding GM. For repair designs, the analysis of point [21.A.91](#_DxCrossRefBm1649096897) should be performed using [GM 21.A.435(a)](#_DxCrossRefBm1649097040). For a major change, [AMC 21.A.15(b)](#_DxCrossRefBm1649096964) should be used as applicable to the change. ##### AMC 21.A.93(b) Certification programme for a change to a TC or an STC *ED Decision 2019/018/R* The description of the 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. Guidance on areas that are changed and affected by the change is found in [GM 21.A.101](#_DxCrossRefBm485230538), Section 3.9.1. Identification of reinvestigations referred to in point [21.A.93](#_DxCrossRefBm485230341)(b)(2), necessary to demonstrate compliance, does not mean the demonstration of compliance itself, but the list of 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. Before submitting the application for a change, the analysis and classification activities of points [21.A.91](#_DxCrossRefBm485230388) and [21.A.101](#_DxCrossRefBm485230489) should be performed using the corresponding GM. For repair designs, the analysis of point [21.A.91](#_DxCrossRefBm485230388) should be performed using [GM 21.A.435(a)](#_DxCrossRefBm485230531). For a major change, [AMC 21.A.15(b)](#_DxCrossRefBm485230455) should be used as applicable to the change.