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...Numberac issue date self manufactured tools and equipment by maintenance organization flight standard department contents basis purpose applicability cancellation explanations definition basic principle for design manufacturing management of approval caac authorized this advisory circular is established on the civil aircraft st ccar r issued dec it aims at providing guidance organizations how to meet s requirements when applicable all intentionally left blank though generally shall use suggested in airworthiness data provided manufacturers can be used while necessary some them are accordance with as a substitute without manufacturer ac different accordingly various cases so satisfy not meant that designed internally one those their own purposes fully responsible saled general specially but size accuracy scale range required special recommended technical only maintaining designated or its component they process determining return service test also final cannot under quality system appro...