What AS9120D Certification Means for Aerospace Buyers Sourcing Precision Components
When sourcing precision components for aerospace applications, supplier certifications matter — not as marketing credentials, but as evidence that a supplier’s quality system meets the requirements of the industry. AS9120D is one of those certifications, and understanding what it requires helps aerospace buyers evaluate suppliers more accurately.
FM Machine holds AS9120D certification alongside ISO 9001:2015, a combination that reflects a quality management system built for the rigor aerospace and defense customers expect. FM Machine’s precision CNC machining services serve aerospace and defense customers who require certified suppliers.
What AS9120D Is
AS9120D is an aerospace quality management system standard published by the Society of Automotive Engineers (SAE) through the International Aerospace Quality Group (IAQG). It is based on ISO 9001 and adds aerospace-specific requirements on top of the ISO foundation.
AS9120D is specifically designed for distributors of aerospace parts, materials, and assemblies — organizations that stock, sell, and distribute aviation hardware without performing manufacturing operations themselves. This distinguishes it from AS9100D, which is the standard for aerospace manufacturers and maintenance, repair, and overhaul (MRO) organizations.
For a precision machine shop, AS9120D certification indicates that the shop’s quality management system meets the rigorous documentation, traceability, and process control requirements that aerospace distributors and supply chain participants must maintain.
What AS9120D Requires
AS9120D shares the structure of ISO 9001 but adds requirements specific to aerospace supply chain integrity:
- Product traceability: Full documentation of material origin, certifications, and chain of custody from supplier to customer
- Counterfeit part prevention: Documented processes for identifying and controlling the risk of counterfeit or fraudulent hardware entering the supply chain
- First article inspection: Documented verification that a new part or supplier meets all drawing and specification requirements before production quantities are accepted
- Customer flow-down requirements: Systematic handling of quality requirements passed from the prime contractor or OEM through the supply chain
- Nonconformance control: Documented procedures for identifying, segregating, and dispositioning nonconforming material before it reaches the customer
- Corrective action: Root cause analysis and corrective action documentation for quality escapes and supplier nonconformances
These requirements are audited by a certified third-party registrar and must be maintained through ongoing surveillance audits to retain certification.
Why Certification Matters in Aerospace Sourcing
Aerospace programs operate under FAA, EASA, and DoD requirements that flow quality obligations from prime contractors to their suppliers. A prime contractor sourcing components from a non-certified supplier assumes responsibility for that supplier’s quality system — which creates regulatory exposure and program risk.
Sourcing from an AS9120D-certified supplier transfers quality system responsibility to a supplier whose processes have been independently audited and verified. For buyers managing supplier qualification requirements, a certified supplier is faster to qualify, carries less program risk, and simplifies the documentation burden at receiving inspection.
AS9120D vs. AS9100D: Understanding the Difference
The distinction between AS9120D and AS9100D is worth understanding clearly:
- AS9100D applies to organizations that design, develop, or manufacture aerospace products — aircraft manufacturers, engine OEMs, and precision machined component manufacturers producing parts for aerospace use
- AS9120D applies to organizations that distribute, stock, and resell aerospace products — hardware distributors, parts brokers, and supply chain intermediaries
Some aerospace customers require AS9100D from all manufacturing suppliers. Others accept AS9120D. The applicable standard depends on your customer’s purchase order requirements and quality flow-down clauses. Review your customer’s supplier quality requirements before specifying a certification standard.
What to Ask a Certified Supplier
Certification alone tells you a supplier has passed an audit. It doesn’t tell you how they perform day-to-day. When evaluating an AS9120D-certified machine shop for aerospace component sourcing, ask:
- When was your last surveillance audit, and were there any findings?
- What is your on-time delivery performance for aerospace customers?
- How do you handle customer flow-down requirements from prime contractors?
- Can you provide a sample first article inspection package?
- What is your counterfeit part prevention procedure?
A shop that can answer these questions clearly and specifically is one whose certification reflects operational reality, not just paperwork.
Aerospace Precision Machining at FM Machine
FM Machine’s AS9120D and ISO 9001:2015 certifications are backed by quality processes that aerospace customers can rely on. Our aerospace precision manufacturing capabilities cover the materials, tolerances, and documentation requirements that flight-critical and defense applications demand.
Request a quote for your aerospace component requirements and we’ll review your drawings and flow-down requirements together.