Aerospace buyers filter suppliers on certification long before they look at price, and AS9100 is the filter almost everyone uses. The problem is that AS9100 certificates are frequently treated as a badge rather than a scope, and the difference between a certificate that covers the work you are buying and one that does not is a line of text most buyers never read. This guide covers what AS9100 actually adds over ISO 9001, what the certificate scope must say before it means anything, and the eight checks a buyer should run before awarding aerospace PCB work.
AS9100D Versus ISO 9001 in One Paragraph You Can Use
ISO 9001 is a general quality management standard. AS9100D is that standard with the aerospace, space and defence additions layered on top. The additions that matter to a PCB buyer are specific and checkable: formal risk-based thinking at the process level, configuration management so that a board revision cannot silently change, foreign object debris control on the shop floor, a counterfeit parts programme aligned to AS5553, and the flow-down of special requirements from the customer through to sub-tier suppliers. None of those are optional extras in AS9100D, and each one has a visible artefact a buyer can ask to see.
| AS9100D Requirement | What It Means for a PCB Order | Artefact to Ask For |
|---|---|---|
| Risk-based planning | Process risk assessed per product, not generically | Product-level FMEA or risk register for your part family |
| Configuration management | Board revision is controlled and traceable to the build | Revision control record on the traveller and the drawing |
| Counterfeit parts (AS5553) | Component sourcing screened for counterfeit risk | Written counterfeit mitigation plan and supplier approval list |
| FOD control | Loose material controlled through assembly | FOD programme description and shop-floor evidence |
| Special requirements flow-down | Your customer's requirements reach sub-tier suppliers | Purchase-order flow-down clause example |
The value of AS9100D for a buyer is therefore not that the supplier is "certified" but that these five artefacts exist and are maintained. A supplier holding a genuine certificate will produce them without hesitation, because the certification audit already forced them into existence.
What the Certificate Scope Must Say to Cover Your Board
This is the check that most buyers skip, and it is the one that voids everything else. An AS9100 certificate carries a scope statement describing exactly what activities at exactly which site the certificate applies to. For a PCB purchase, the scope must include the manufacturing activity you are buying — printed circuit board fabrication, or electronic assembly, or both — at the site that will build your product. A certificate whose scope reads as design, distribution or a head-office function does not cover the fab.
Two further distinctions matter. First, site versus corporate certificates: a group may hold a certificate covering one site or the corporate entity while the board you are buying is built at a different, uncertified site. Second, the broker problem: a trading company or broker can hold a scope covering distribution, and presenting that as evidence of a certified fab proves nothing about who actually drills the holes. When a supplier tells you they are AS9100 certified, the question is always the same: show me the certificate, read me the scope, and tell me which site builds my boards.
Certifications That Commonly Travel With Aerospace PCB Work
AS9100 is rarely the only certificate in the file, and knowing which of the others are genuinely relevant prevents a buyer from either accepting a decorative certificate or rejecting a supplier over one that does not apply. The ones consistently relevant to aerospace PCB procurement are: ISO 9001 as the base quality system; AS9100D as the aerospace addition; NADCAP accreditation specifically for the special processes the supplier performs in-house, such as plating or chemical processing, since NADCAP is process-specific and a certificate for one process says nothing about another; UL recognition for the laminate and board flammability class; IPC-6012 and IPC-A-610 Class 3 qualification for the board and assembly acceptance criteria; and RoHS and REACH declarations for material compliance.
The distinction between mandatory and preferred matters here too. Aerospace programs will typically insist on AS9100D and on IPC Class 3 for the board and the assembly, and will ask for NADCAP where the supplier performs a critical special process in-house. UL and materials declarations are usually documentation requirements rather than award gates. Getting this hierarchy right stops a buyer from treating a materials declaration as equal in weight to the quality-system certificate.
Can an Offshore Supplier Hold AS9100 and Still Be Usable?
Yes, and the reason is that AS9100 and ITAR are two different things that buyers routinely conflate. AS9100 is a quality management certification. Any qualified certification body can audit a facility anywhere in the world and issue it, and a fabrication plant outside the United States can hold AS9100D legitimately. ITAR is a United States export-control regime that applies to defence articles and technical data on the US Munitions List, and it is about who may access controlled technical data and articles, not about quality systems.
The consequence for a buyer is a decision tree rather than a rule. If your program is commercial aerospace with no ITAR-controlled content, an offshore supplier holding AS9100D, IPC Class 3 and the relevant materials documentation is a usable and often competitive option, provided the scope covers the site. If your program involves ITAR-controlled articles or technical data, the supplier must be in a position to handle that data lawfully, and a manufacturing facility outside the United States that is not ITAR-registered cannot receive controlled technical data — regardless of how good its AS9100 certificate is. In that case the split is usually that the assembly or fabrication is offshore while the controlled data handling stays with a registered entity, and that arrangement has to be designed deliberately rather than assumed. The certification itself is the wrong axis for the ITAR question; the data is.
The Eight-Point Audit a Buyer Runs
Before awarding aerospace PCB work, these checks turn a certificate into evidence. Each one has a concrete output, and a supplier whose certificate is real will produce all eight.
Look the certificate up in OASIS
The aerospace industry maintains a public certification database. An AS9100 certificate that does not appear in the relevant certification body's registry, or whose expiry has passed, should be treated as absent.
Read the scope and the site
Confirm the scope literally covers the manufacturing activity you are buying at the site that will build your boards, and that the certificate has not expired.
Ask for the counterfeit mitigation plan
AS5553 requires a documented programme covering component sourcing, incoming inspection and traceability. Ask to see the document, not a verbal assurance.
Ask for the FOD programme
Foreign object debris control should be visible on the shop floor and described in a procedure. For board assembly this covers loose hardware, solder balls and packaging debris.
Check calibration and equipment records
Inspection and test equipment must be calibrated with traceable records. This is the practical foundation the rest of the quality system stands on.
Confirm the FAI and traceability package
Ask for the AS9102 first article inspection package and the lot traceability scheme. On an aerospace program the FAI is a deliverable, and the method mirrors the wider first article inspection package a buyer needs.
Verify sub-tier control
The supplier's own sub-tier suppliers — laminate, plating chemistry, component distributors — must be approved and controlled under the same programme, including flow-down of your requirements.
Ask how changes are notified
A change to a process, material or sub-tier supplier on an aerospace part should trigger notification to the customer. Ask for the procedure and the last time it was used.
Red Flags
Several patterns should stop an award rather than start a negotiation. An expired certificate is the simplest and most common. A scope that does not mention the manufacturing activity you are buying, or that names a different site, means the certificate does not apply. No entry in the public certification registry means the certificate cannot be independently confirmed. A refusal to provide the AS9102 first article inspection package on a program that requires it signals that the programme exists on paper only. And "AS9100 compliant" or "working to AS9100" is not certification at all — a supplier that cannot produce the certificate is describing intent, not a status. The wider discipline of reading supplier quality claims is the same one used in a general supplier audit, and the acceptance criteria sit alongside the general IPC Class 2 versus Class 3 decision.
At Huaxing PCBA we manufacture to IPC-6012 and IPC-A-610 Class 2 and 3 under IATF 16949 and ISO 9001 systems across 8 SMT lines and 32-layer fabrication capability in Shenzhen, and we support aerospace and defence programs with the documentation package a buyer's audit requires. Send your Gerber and BOM with your certification requirements and we will return the certificate scope, FAI format and traceability scheme alongside the quote, or talk to us about the qualification path for a new aerospace program.
