21.A.7 Instructions for continued airworthiness

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

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

1. a type-certificate or restricted type-certificate to each known owner of one or more products, UAS or CMUs upon their delivery 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, the UAS or the CMU affected by the change upon the release to service of the modified product or modified CMU;

3. a repair design approval to all known operators of the product or the CMU affected by the repair upon the release to service of the product or the CMU in which the repair design is embodied; the repaired product, part, appliance, CMU or CMU component may be released into service before the related instructions for continued airworthiness have been completed, but this shall be for a limited service period, and in agreement with the Agency.

Thereafter, those design approval holders shall make those instructions available on request to any other person required to comply with those instructions.

(c) 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 the CMU, or modified product or modified CMU, has entered into service, but shall make those instructions available before the use of this data is required for the product or modified product.

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