21L.A.9 Instructions for continued airworthiness

(a) The holder of a type certificate, supplemental type certificate, design change or repair design approval or the declarant of a declaration of design compliance shall establish the information which is necessary for ensuring that the airworthiness of the aircraft type and any associated part, conforming to that design, is maintained throughout the operational life.

(b) The holder of a type certificate, supplemental type certificate, design change or repair design approval or the declarant of a declaration of design compliance shall provide the information established in (a) before that design is released to service.

(c) The instructions for continued airworthiness shall be provided by:

1. the holder of a type certificate or by the declarant of a declaration of design compliance to each known owner of one or more products upon its delivery or upon the issuance of the first certificate of airworthiness or restricted certificate of airworthiness, as applicable, for the affected aircraft, whichever occurs later;

2. the holder of a type certificate, supplemental type certificate or minor change approval or by the declarant of a declaration of design compliance for a design change to all known operators of the product affected by the change upon the release to service of the modified product;

3. the holder of a repair design approval or by the declarant of a declaration of design compliance for a repair design 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 or part 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, these certificate holders or declarants shall make this information available on request to any other person required to comply with those instructions for continued airworthiness.

(d) By way of derogation from point (b), the type-certificate holder or declarant of a declaration of design compliance 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 shall make those instructions available before the use of this data is required for the product or modified product.

(e) The design approval holder or declarant of a declaration of design compliance who is required to provide instructions for continued airworthiness in accordance with point (b) shall also make available all the changes to those instructions to all the known operators of the product affected by the change, and, on request, to any other person required to comply with those changes.