A 'repair' is defined as the elimination of damage and/or restoration to an airworthy condition following initial release into service by the manufacturer of any product, part or appliance.Production of repair parts
Parts and appliances to be used for the repair are manufactured in accordance with production data based upon all the necessary design data as provided by the repair design approval holder under Part-21 Subpart F; or by an organisation appropriately approved in accordance with Part-21 Subpart G; or by an appropriately approved maintenance organisation
Repair embodiment
The embodiment of a repair is made in accordance with Part-M or Part-145 as appropriate, or by a production organisation appropriately approved in accordance with Part-21 Subpart G.
The design organisation provides to the organisation performing the repair all the necessary installation instructions.