AS9100 vs ISO 9001: What Aerospace Buyers Actually Need

This comparison is for aerospace procurement, supplier-quality and engineering teams deciding what evidence to request from a CNC machining supplier. It is not a certification audit, legal advice or a substitute for the customer contract. The most useful answer to “does a CNC supplier need AS9100?” is conditional: the requirement belongs to the programme and supply-chain flow-down, not to the word aerospace by itself.

AS9100 vs ISO 9001: what each standard answers

ISO 9001 asks whether an organisation has a general quality-management system that is established, controlled, evaluated and improved. AS9100 asks for that foundation plus additional requirements tailored to aviation, space and defense supply chains. IAQG states that the 9100 series is based on ISO 9001 requirements and supplemented by additional aerospace quality-management requirements. Neither standard by itself approves a drawing, certifies a part for flight or replaces customer-specific qualification.

See the IAQG 9100 standard overview and ISO's ISO 9001:2015 requirements page for the standards' official framing.

Does a CNC supplier need AS9100?

Sometimes. A supplier may need AS9100 when the prime, customer, contract, purchase order or programme quality clause explicitly flows that requirement down. Another programme may accept an ISO 9001 supplier after a customer audit, a source-approval process or a defined work package. A part's end use alone does not let a buyer infer the answer, and a supplier should not promise acceptance without reading the actual requirements.

1. Read the flow-down. Look for AS9100/9100-series wording, customer-approved-source rules, quality clauses, FAI, traceability and special-process requirements.
2. Separate certification from qualification. Identify whether the requirement is a QMS certificate, a customer approval, a specific process approval, a part approval or a controlled documentation package.
3. Check the part risk. Structural, safety-critical, key-characteristic or special-process work may trigger deeper controls even when the certificate wording is not obvious.
4. Ask who owns acceptance. The buyer, prime or design authority may retain approval of deviations, concessions, FAI and final use.
5. Confirm alternate paths in writing. If ISO 9001 plus customer audit or source approval is acceptable, get that acceptance from the authorised programme contact before placing the order.

This decision path prevents two common errors: rejecting a technically suitable supplier because a generic checklist says “aerospace equals AS9100,” or accepting a certificate as a substitute for the actual customer and product requirements.

What aerospace machining quality certification does not prove

A certificate describes a management-system scope. It does not automatically prove that a supplier can make every alloy, tolerance, geometry or special process in your drawing. It also does not create authorisation for controlled technical data or regulated activity.

SAE's AS9102 standard page identifies FAI documentation as its subject. IAQG's OASIS page identifies the database as the reliable source for 9100-series supplier certification and registration data. Use those sources for the relevant verification step, not as a substitute for your own programme review.

How to qualify an aerospace CNC supplier

1. Start with the programme. Collect the drawing, customer quality clauses, applicable specifications, delivery destination and required records.
2. Verify certificate scope. Ask for the current certificate, site/address, activities covered, validity dates and issuing certification body.
3. Use the right registry. For 9100-series claims, check the IAQG OASIS route and reconcile the supplier identity and scope. IAQG explains that the certification scheme uses accredited third-party certification bodies.
4. Test the work package. Review a sample FAI, CMM report, material certificate and change-control record or agree when those records will be generated.
5. Confirm capability separately. Match machines, materials, tolerances, finishing, inspection equipment, outside processes and capacity to the actual drawing.
6. Write the acceptance path. Define who approves FAI, deviations, concessions, process changes and final shipment release.

For the CMM and FAI evidence questions behind this qualification flow, see the remote CNC quality-evidence guide and the site's quality assurance page. The evidence should be portable: another reviewer should be able to connect the record to the same revision, characteristic and lot.

Sendot's certification boundary

Sendot Technology currently states ISO 9001 capability on the site. This article does not claim that Sendot holds AS9100, ISO 13485 or any other sector-specific certification. It also does not claim ITAR registration, export authorisation or flight-qualified capability. If a programme requires AS9100 or another controlled qualification, ask Sendot to review the requirement and confirm fit before award; do not treat an ISO 9001 statement as an automatic substitute.

The buyer can still request a project-specific review of drawing, material, critical characteristics, FAI, CMM, traceability and document expectations through the request-a-quote form. Any acceptance, customer approval or regulatory conclusion remains with the party that owns that decision.

Frequently asked questions

For a supplier decision, share the drawing, programme/customer requirements, critical characteristics, material and heat/lot expectations, FAI or CMM needs, special-process controls and documentation format. Sendot can review the requirements before you decide whether the available evidence matches the job.