AMC1 21L.A.206 Demonstration of compliance

The description of the repair should include an explanation of the purpose of the repair, the pre-repair and post-repair configuration(s) of the product, schematics/pictures, and any other detailed features and boundaries of the repair (this may be supplemented by drawings or outlines of the design, if this helps to understand the repair), as well as the identification of the affected areas of the product that are functionally affected by the repair, 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 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.

For a major repair, AMC1 21L.A.24(b)(4) should be used as applicable to the change for the development of the compliance-demonstration plan.

Compliance documentation for the demonstration of compliance in point 21L.A.206(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.

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.

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.

The level of detail of the compliance documentation that is referred to in point 21L.A.206(a) should be the same regardless of whether the repair is approved by EASA or under a design organisation approval (DOA) privilege, to allow the repair to be assessed in the frame of the DOA surveillance.

The compliance-demonstration process always takes into account the specific configuration(s) in the type certificate (TC) to which the major repair under approval is applied. This (these) configuration(s) may be defined by product models/variants or by repairs to the type design. The demonstration of compliance covers this (these) applicable specific configuration(s). Consequently, the approval of the major repair excludes any other configurations, in particular those that already exist but are not considered in the compliance-demonstration process, as well as those that may be certified in the future.

For major repairs approved by a design organisation approval (DOA) holder on the basis of its privilege as per point 21.A.263(c)(5) of Annex I (Part 21), the process described under AMC No 2 to 21.A.263(c)(5), (8) and (9) applies.