AMC1 21.A.7(b) Identification of a complete set of instructions for continued airworthiness (ICA)

CAA ORS9 Decision No. 48

The design approval holder (DAH) should identify the complete set of ICA according to point 21.A.7(b) in such a way that the complete set can be:

  1. directly listed in the product TCDS; or

  2. indirectly referenced in the TCDS through other means, which allow the complete list of the ICA to be obtained (e.g. a complete listing of ICA contained in a ‘principal manual’ or a reference to a DAH’s website); or

  3. directly listed in the product STC; or

  4. indirectly referenced in the STC through other means, which allow the complete list of the ICA to be obtained; or

  5. if direct reference is made to the ICA in the TCDS or the STC, no reference to the revision level of the ICA should be made; in this case, the revision level should be available elsewhere (e.g. on the DAH’s website). In certain circumstances it still may be appropriate to reference a specific revision of ICA in the TCDS/STC e.g., a revision to the TCDS/STC which details a design change which introduces or affects CMR/ALS.

For changes to type certificates and repairs, the identification of ‘a complete set of the changes to the instructions for continued airworthiness’ should be performed by the DAH either by way of a statement which provides this information, or by confirmation that there are no changes to the ICA. This statement can also be made in the accomplishment document (e.g. embodiment instructions such as modification documents, Service Bulletins, repair schemes etc).

For products and articles for which the DAH holds a design organisation approval (DOA), the ICA are considered to be issued under the authority of the DOA and, therefore, the approval of the ICA should be made explicit to the reader in accordance with point 21.A.265(h), unless otherwise agreed with CAA.