Regulations of Airworthiness and Maintenance Management for Aviation Products, Appliances and Parts Article 21
Aircraft major repair or major alteration must be performed in accordance with data approved by CAA. This requirement does not apply to any of these works done in compliance with the Airworthiness Directive issued by the CAA ,the aviation authorities of State of Design or the State of Design of Modification.Owner or operator who intends to fabricate the part for maintaining his own aircraft shall submit the fabrication procedures to CAA for approval.Unless the part is fabricated in accordance with CAA accepted data, no person can install that part onto aircraft.
中文原文 航空產品與其各項裝備及零組件適航維修管理規則第21條
航空器所有人或使用人從事航空器之大修理、大改裝，應依民航局核准之文件執行。
但依民航局、航空器原設計國或改裝設計核准國民航主管機關通告之適航指令執行者，不在此限。
航空器所有人或使用人從事零件配製者，得建立零件配製程序，於報經民航局核准後，始得辦理。
前項零件應依民航局同意之技術資料配製，始得裝置於其航空器。
但依民航局、航空器原設計國或改裝設計核准國民航主管機關通告之適航指令執行者，不在此限。
航空器所有人或使用人從事零件配製者，得建立零件配製程序，於報經民航局核准後，始得辦理。
前項零件應依民航局同意之技術資料配製，始得裝置於其航空器。