31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

where an overlap of responsibility between licence categories occurs,the person primarily responsible for the item must involve all othertrade disciplines affected. Every person to whom this Notice appliesmust therefore be conversant with all other relevant paragraphs of thisNotice. Certificates of Release to Service for each relevant tradecategory must be issued by all persons concerned, each assumingresponsibility of and certifying those aspects of the work for which thelicence/authorisation holder is entitled to assume responsibility.1.5 A Certificate of Release to Service shall only be issued on completion ofmaintenance when the signatory is satisfied that the work has been properlycarried out and accurately recorded, having due regard to the use of:(a)(b)(c)up-to-date instructions and maintenance data (including manuals,drawings, specifications, CAD mandatory modifications/inspections,and, where applicable, company procedures);recommended tooling and test equipment which is currently calibratedwhere applicable; anda working environment appropriate to the work being carried out.When issuing a Certificate of Release to Service for work performed by others,the certifying staff assumes responsibility. The certifying staff must haveinspected a sufficiently representative sample of the work and the associateddocumentation, and be satisfied with the competence of the persons who haveperformed the work. For complex tasks this may require progressiveinspections to be carried out as the work proceeds. In the case of an aircraftor component where welding a metallic part is considered essential toairworthiness, it is the responsibility of the certifying staff to establish that thewelder is approved in accordance with the requirements in HKAR-1Sub-section 1.8-10.NOTE: HKAR-66 Aircraft Maintenance Licence holders certifying under the privileges oftheir licence may not deviate from the manufacturer's maintenance instruction ormaintenance data, nor use alternative parts, components or assemblies unless suchdeviation is supported by the written agreement of the manufacturer, approved as amodification or agreed by the Director-General. The Director-General should beconsulted in cases of difficulty. Certifying staff shall comply with all companyprocedures covering such issues.1.6 (a) When the work involves the assembly or any disturbance of a vitalpoint defined in HKAR-1 Sub-section 1.5-3 or control system, theduplicate inspection required must be completed and certified inaccordance with HKAR-1 Sub-section 1.6-2 before the relevantCertificate of Release to Service is issued.30 May 2008 AN-3 P.4