21.A.147 Changes to the approved production organisation

(a) After the issue of a production organisation approval, each change to the approved production organisation that is significant to the showing of conformity or to the airworthiness and environmental characteristics of the product, part or appliance, particularly changes to the quality system, shall be approved by the CAA. An application for approval shall be submitted in writing to the CAA and the organisation shall demonstrate to the CAA, before implementing the change, that it complies with this Subpart.

(b) The CAA shall establish the conditions under which a production organisation approved under this Subpart may operate during such changes unless the CAA determines that the approval should be suspended.