AS9100 Rev D CNC Machining

Karl Gillihan

✈️ AS9100

AS9100 Rev D CNC Machining Shops for Aerospace Parts

Flight hardware does not forgive a missed dimension or a mystery bar of titanium, which is why aerospace primes will not buy CNC parts from a shop that holds only ISO 9001. AS9100 Rev D builds the entire 9001 framework and then bolts on the things that keep a machined fitting from becoming a field event: configuration control, counterfeit prevention, foreign object debris discipline, and the AS9102 first article.

AS9100NADCAPISO 9001

AS9100 Rev D incorporates ISO 9001:2015 verbatim and then adds aerospace-specific clauses that change how a CNC shop runs every job. Clause 8.1.4 mandates a documented prevention of counterfeit parts program, which on the machining side means controlling where raw material and purchased hardware come from and verifying mill certs against the heat lot, not just filing them. Clause 8.1.3 requires product safety planning, forcing the shop to identify which features on a part are flight-safety critical and to flow that down to the operator and inspector. Configuration management under clause 8.1.2 is the clause buyers underestimate. On aerospace work the print revision, the engineering change order, and the as-built configuration must all reconcile, so the shop cannot quietly machine to rev C while you ordered rev D. Risk-based thinking from 9001 becomes formal operational risk management, and key characteristics (KCs) get statistical attention rather than a pass/fail glance. The two clauses a machining buyer feels most are FOD prevention and first article. FOD control means the shop has a written program covering chip and burr removal, tool accountability, and clean handling so a loose chip does not end up in a fuel system. The AS9102 first article inspection is a full, balloon-keyed verification of every dimension and note on a new or changed part, documented across the standard Form 1, Form 2, and Form 3, before production parts ship.

Verifying an AS9100 Certificate Through OASIS

AS9100 is policed more tightly than a generic 9001 cert because the IAQG runs a single global database, OASIS (Online Aerospace Supplier Information System). Every legitimate AS9100 certification is recorded there with the certificate number, the certification body, the accreditation body, the scope, and the current status. A buyer can confirm a supplier's certificate is active and not suspended directly in OASIS, which makes the aerospace cert one of the easier ones to verify honestly. Watch the scope statement closely. It should name machining of aerospace components and may call out the materials or processes covered. A shop certified for assembly is not necessarily certified for the precision machining you need. Also confirm the certification body is accredited and itself listed; AS9100 audits are performed by sanctioned auditors trained on the aerospace scheme, not general 9001 auditors. A suspended or expired OASIS record is a hard stop. Aerospace certificates can be pulled between audits for major nonconformances, and a shop will sometimes keep showing an old PDF certificate after the database status has changed. Always trust the OASIS status over the framed paper on the wall.

The Documentation Package to Expect

An AS9100 shop ships parts with a heavier paper trail than a commercial shop, and that is the point. Expect a certificate of conformance referencing the print revision and PO, full material certs (mill test reports) traceable to the heat or lot, and certs for any special processes performed by sub-tier suppliers, with those subs themselves flowed the aerospace requirements. For first articles, you receive the completed AS9102 package: Form 1 (part number accountability), Form 2 (product and process accountability, including special processes and material), and Form 3 (the characteristic accountability sheet that maps every balloon on the print to an actual measured result). For production parts, expect dimensional reports on key characteristics and, where called out, statistical process control data. Counterfeit prevention and FOD records may be referenced rather than shipped, but you can audit them. The practical buyer move is to confirm on the PO exactly which documents travel with each shipment so the shop does not interpret minimum compliance as the ceiling.

Industries and Programs That Demand This Combination

AS9100 CNC machining is the entry ticket for commercial aviation (Boeing, Airbus and their tier-one suppliers like Spirit AeroSystems and Collins), defense aircraft and missiles, space launch and satellite hardware, and increasingly for industrial gas turbine and energy components that borrow aerospace pedigree. If you are machining brackets, housings, manifolds, structural fittings, or engine components in 6061 and 7075 aluminum, 15-5 and 17-4 PH stainless, Ti-6Al-4V, or Inconel 718 and 625, the buyer on the other end almost certainly requires AS9100. The combination also matters for new-space and UAV programs where the prime may be smaller but the flow-down is identical. These programs frequently pair AS9100 with NADCAP accreditation for any special process the shop performs in-house, such as heat treat, anodize, or NDT, because AS9100 governs the quality system while NADCAP governs the special process itself. For anything that does not fly and is not destined for a regulated aerospace assembly, AS9100 is expensive overkill. The certification carries real cost that shows up in part price, so reserve it for work that genuinely needs the aerospace pedigree.

Frequently Asked Questions

AS9100 Rev D contains all of ISO 9001:2015 and adds roughly a hundred aerospace-specific requirements on top. For a CNC shop the meaningful additions are a documented counterfeit part prevention program, formal configuration management so you always get the correct print revision, product safety and key characteristic management, foreign object debris (FOD) control covering chips and tooling, and the AS9102 first article inspection regime. ISO 9001 tells you a shop has a credible quality system; AS9100 tells you that system is built to aerospace flight-hardware expectations and is verified through the global OASIS database. The practical consequence is more inspection, more traceability, tighter material control, and a heavier documentation package per shipment. That rigor costs money and time, which is exactly why you should not require AS9100 for non-flight industrial work, but it is non-negotiable the moment a part is destined for an aircraft, spacecraft, or defense system.

It depends on whether the shop performs special processes. AS9100 governs the overall quality management system, but it does not by itself accredit special processes like heat treatment, chemical processing (anodize, passivation, plating), welding, or nondestructive testing (NDT). Aerospace primes generally require those specific processes to be NADCAP accredited, whether performed in-house or at a sub-tier supplier. So a pure machining shop that mills and turns parts and outsources its heat treat and finishing needs to be AS9100 certified itself and needs to flow work to NADCAP-accredited processors. If the shop heat treats or anodizes in-house, it typically needs both AS9100 and the relevant NADCAP accreditation for that process. The clean way to check: confirm the shop's AS9100 scope, then ask which special processes are internal and request the NADCAP certificate for each, or the sub-tier's NADCAP cert if outsourced.

A full AS9102 first article inspection typically adds several days to a couple of weeks on top of the machining time, scaling with feature count and complexity. The work is real: an inspector balloons every dimension, note, and special process callout on the print, then measures each characteristic, usually on a CMM, and documents the results across Forms 1, 2, and 3 with material and process accountability attached. A simple bracket with thirty features might take a day of inspection; a complex housing with a few hundred features and several special processes can take a week or more, plus any back-and-forth if a characteristic is out of tolerance and needs disposition. Budget for it on new part numbers and after any engineering change, since a Rev change triggers a delta or full FAI. Once the first article is approved, production parts ship on the faster cadence of standard in-process and final inspection.

Yes, and many of the best aerospace machining suppliers are shops with twenty to a hundred employees. AS9100 does not require size; it requires discipline and documentation. A small shop can absolutely maintain counterfeit prevention, configuration management, FOD control, and an AS9102 process if its leadership commits to the overhead. What small shops weigh is cost: the certification audit cycle, a quality manager or quality function, calibration programs, and the inspection labor for first articles all add fixed cost that is easier to absorb at volume. The result is that AS9100 shops, large or small, price aerospace work above commercial machining. When sourcing, do not screen out small suppliers; some are more responsive and more capable on low-volume flight hardware than large shops. Verify their OASIS record and scope, confirm their special-process flow-downs, and judge them on capability and capacity rather than headcount.

Last updated: July 2026

Find AS9100-Certified CNC Machining Suppliers

Search verified cnc machining shops that hold AS9100.

Search Manufacturers →Get Your Shop Listed (Free)

No logins. No email gates. Just results.