21.A.7 Instructions for continued airworthiness

SI No. 588/2023

(a) The holder of a type-certificate, restricted type-certificate, or supplemental type-certificate, design change or repair design approval must develop or reference the instructions which are necessary for ensuring that the airworthiness standard related to the product and any associated part is maintained throughout the operational life of the product, when demonstrating compliance with the applicable type-certification basis established and notified by the CAA in accordance with point 21.B.80.

(b) At least one set of complete instructions for continued airworthiness must be provided by the holder of:

1. a type-certificate or restricted type-certificate to each known owner of one or more products upon delivery of that product or products, or upon the issuance of the first certificate of airworthiness or restricted certificate of airworthiness for the affected aircraft, whichever occurs later;

2. a supplemental type-certificate or design change approval to all known operators of the product affected by the change upon the release to service of the modified product;

3. a repair design approval to all known operators of the product affected by the repair upon the release to service of the product in which the repair design is embodied. The repaired product, part or appliance may, if the CAA agrees, be released into service before the related instructions for continued airworthiness have been completed, but this must be for a limited-service period agreed by the CAA.

(c) After that, any other person required to comply with those design approval holders’ instructions must be provided with them on request.

(d) By way of derogation from point (b), the type-certificate holder or restricted type-certificate holder may delay the availability of a part of the instructions for continued airworthiness, dealing with long lead accomplishment instructions of a scheduled nature, until after the product or modified product has entered into service, but must make those instructions available before the use of the instructions is required for the product or modified product.

(e) The design approval holder, who is required to provide instructions for continued airworthiness in accordance with point (b), must also make available changes to those instructions to all known operators of the product affected by the change and, on request, to any other person required to comply with those changes. On request, that design approval holder must demonstrate to the CAA the adequacy of the process of making changes to the instructions for continued airworthiness available in accordance with this point.