Aircraft Flight Operation Regulations Article 139
An operator shall bear the primary responsibility for the proper maintenance of its aircraft and maintain in an airworthy condition, ensure the operational and emergency equipment necessary for an intended flight is serviceable, and the certificate of airworthiness of each airplane they operate remains valid.An operator may contract its maintenance programme to a person, group of persons, or maintenance organization approved by CAA but the operator remains accountable for the maintenance operations aforementioned in the preceding paragraph.After the maintenance of aircraft aforementioned in the preceding paragraph has been completed, the maintenance release shall be signed by a CAA approved person or group of persons or maintenance organizations to indicate its airworthy condition.
中文原文 航空器飛航作業管理規則第139條
航空器使用人對其航空器負妥善維護之主要責任，並保持其符合持續適航標準，且各式飛航及緊急裝備應符合飛航作業需求，並維持其航空器適航證書之有效性。
航空器使用人得將其航空器之維護委託經民航局核准之個人、團體或維護機構執行，但仍負有前項之責任。
前項航空器維護完成時，應經民航局核准之個人、團體或維護機構負責簽證證明其適航。
航空器使用人得將其航空器之維護委託經民航局核准之個人、團體或維護機構執行，但仍負有前項之責任。
前項航空器維護完成時，應經民航局核准之個人、團體或維護機構負責簽證證明其適航。