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c)  Other approvals. For modifications that do not warrant the detailed approval process of an Amended or Supplemental Type Certificates, States may consider other means of granting approval. Such means of approval may be administered by delegated individuals or organizations with demonstrated technical competence, and reported to the CAA under an administrative reporting system for purposes of regulatory oversight. Modifications that are candidates for this approval category typically involve on-demand design changes by aircraft operators, maintenance and/or design organizations, and manufacturers to support varying maintenance and operational needs under time constraints. Examples of modifications that can be approved under this category are: Product improvements by manufacturers (introduced through service bulletins), airline-type modifications relating to operational reliability or passenger configuration changes, repair design, field-type modifications that do not involve extensive or multi-discipline engineering analysis. The types of design changes that can be approved using this other means should be decided by each State according to their resources, delegation policy, and the level of modification activity within their civil aviation industry.
5.4.5.3.2  The person or organization (holder) to whom the modification approval was granted has responsibility for the approved design change. If multiple participants (e.g. joint design ventures, partnerships, sub-contracting or similar arrangements) are involved in the modification, the CAA will require one person or organization to be responsible for the overall design change, and to whom the approval will be issued.
5.4.5.3.3  An approval granted for a modification (amended Type Certificate, Supplemental Type Certificate or other approvals) shall remain valid until otherwise specified or notified by the issuing CAA.
5.4.5.4  Providing evidence of approval
5.4.5.4.1 States should require all holders of modification approvals to provide clients or customers of a copy of the CAA approval, or provide a declaration that a modification is CAA-approved. The person or organization performing the installation of a modification on an aircraft, engine, or propeller has a responsibility to ensure that modifications are in accordance with approved data. Providing a copy, or making a declaration, of the CAA approval facilitates the fulfillment of an aircraft Operator’s responsibility under the Maintenance provisions of Annex 6 to retain details of modifications and evidence of its approval.
5.4.5.4.2 States should also require the certification basis of an approved modification be identified and listed as part of the approval document. The detailed certification basis should list the specific airworthiness standards for which compliance with a higher level of amendment were shown (amendment levels higher than those recorded in the Type Certificate data sheet). Providing such detailed recording of the certification basis will facilitate the identification of the current level of safety of a modified product, allowing future proposed modifications to retain or further upgrade it.
5.4.5.5  Documents necessary for a modified product
The conditions and limitations of the approved type design, as initially type certified by the State of Design, are specified in the original Type Certificate data sheet. This information is part of the Type Certificate and is mandatory for the safe operation and continued airworthiness of the aircraft. If the approved modification changes any of the information identified in this manual under Part III, Chapter 1, Section 1.3.5.5, Documents Necessary for Approved Type Design, the applicant should prepare the appropriate revisions to this information and submit to the CAA for approval or acceptance. Following approval by the CAA, the revised information should be published in a form and manner prescribed by the CAA and subsequently provided as part of the modification approval documentation.
　
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