Aerospace Signatures Requirements | Release Engineering

As an international standard that encompasses all of aerospace, AS9100 does not dictate any specific guidance on how signatures or approval of documents work. This is due to the fact that there could be very different customer of legal requirement around this topic depending on which part of aircraft, space or defense your organization works. For this reason, I cannot give you one right answer but rather you need to identify these requirements in your legal or customer requirements (the needs and expectations of interested parties identified in clause 4.2), and then incorporate these requirements into the QMS.

Much of what you have indicated, such as not having the same person write and review a document, are fairly common but not necessarily the rule for any particular company.

For more on what AS9100 says about documentation and configuration management, see the articles: A new approach to document and record control in AS9100, https://advisera.com/9100academy/knowledgebase/new-approach-to-document-and-record-control-in-as9100/ and Understanding configuration management in AS9100 Rev D, https://advisera.com/9100academy/blog/2017/05/08/understanding-configuration-management-in-as9100-rev-d/