1.4.2.4 Certifying the Type Design
1.4.2.4.1 At the completion of the type certification or validation activity, the State of Registry should confirm its approval or acceptance of the type design by issuing its own Type Certificate, or by issuing a letter of approval/acceptance to the Type Certificate holder and the State of Design. The certification basis by which the State of Registry granted its type design approval or acceptance should be clearly documented in the Type Certificate Data Sheet or in the approval letter.
1.4.2.4.2 A Type Certificate, or an approval of a type design, should be effective until surrendered, suspended or revoked, or until a termination date is otherwise established by the issuing CAA.
1.4.3 Post-Type Certification/Validation activities
1.4.3.1 Continuing airworthiness
Both the State of Design and State of Registry are assigned specific responsibilities under Annex 8 (Part II, Chapter 4) on the continued airworthiness of aircraft. The responsible CAA and/or the Type Certificate holder fulfill these responsibilities through a system of receiving and exchanging of information, surveillance, assessment of service difficulty experiences, and development of the necessary airworthiness actions. It is also assumed that there will always be an organization (holder) responsible for the approved type design that can develop the necessary corrective action(s) when required by the CAA. Many Contracting States place reliance on the State of Design and the Type Certificate holder to decide and develop the necessary airworthiness actions that are needed to correct type design deficiencies or in-service difficulties. However, the State of Registry is ultimately responsible for ensuring the continued airworthiness of all its civil aircraft and should decide if and when airworthiness action is needed. Any mandatory continuing airworthiness action originated by the State of Registry should be communicated with the State of Design and the Type Certificate holder. See guidance in Chapter 4 of this Part, Continuing Airworthiness of Aircraft.
1.4.3.2 Changes in approved type design
The Type Certificate holder or any qualified person or organization can propose changes to the approved type design under a system of review and approval established by the State of Registry. See guidance in Chapter 5 of this Part, Changes to Approved Type Design.
1.5 Instructions for continued airworthiness
1.5.1 General
Instructions for continued airworthiness (ICA) are developed by the design approval holder and some of these instructions are approved by the State of Design (see 1.6 below). They provide guidance to the operator about what is necessary to maintain the airworthiness of the aircraft, engine, or propeller, including incorporated modifications or repairs, over time. They provide documentation of necessary methods, inspections, processes, and procedures. These instructions are distributed in two categories depending on the compliance requirements: maintenance requirements that have been specified as mandatory in the approval of the type design and those for which compliance is recommended.
1.5.2 ICA format and topics
1.5.2.1 The format and topics will vary depending upon the subject of the instructions and the complexity of requirements to maintain airworthiness. Specific airworthiness codes specify what needs to be addressed by the ICA.
1.5.2.2 The ICA may include sections on airworthiness limitations, certification maintenance requirements (CMR), maintenance instructions, engine and, if applicable, propeller maintenance, component maintenance, system wiring diagrams, and non-destructive test and inspection. A cross-check should be conducted to ensure that ICA elements required by the relevant airworthiness code are addressed in the aircraft documentation. An example of an ICA checklist is provided in Appendix C to this Chapter.
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