When the ISO certificate cover only one of the office and the processes are the same, how it could be used as AMC?
An ISO 9001 or EN 9100 certificate, issued by an appropriately accredited organisation, could be used as acceptable means of compliance (AMC) for the relevant management system requirements (i.e. quality management elements). In this context, it should be noted that the subject organisation should accept the disclosure of the documentation related to the certification to EASA as the competent authority. On the other hand, the ISO 9001/EN 9100 certificate covers only the quality management elements of the management system, while the other elements as stipulated in the rule that are not covered by ISO/EN certificate should be subject to oversight by the competent authority, such as e.g. adequacy of the processes and procedures.