AS9100 auditors usually focus on objective evidence that nonconformances are identified, contained, investigated, and closed with effective actions. They will sample NCR, MRB, and corrective action records and expect traceability to parts, requirements, approvals, and verification of effectiveness. Exact records depend on your QMS design, system landscape, and validation status.

AS9100, EN9100, and JISQ9100 are technically aligned under the same IAQG 9100-series requirements, but they are not universally interchangeable in practice. Customer contracts, regional expectations, and certification body recognition determine what is actually acceptable. You must confirm what each customer’s purchasing and quality organizations will accept, and maintain clear traceability to the specific standard and revision your QMS is certified to.

AS9120 is intended for aerospace stockist distributors and is based on ISO 9001, but it is not a drop-in replacement for AS9100. Whether a distributor can rely on AS9120 instead of AS9100 depends on scope of activities, customer and contractual requirements, and regulatory context. Some customers will still require AS9100 or equivalent controls.