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First Article Inspection (FAI): What It Proves, When You Need It, and FAI vs PPAP
A first article inspection, or FAI, checks that the very first part off a process matches its drawing before full production runs. Get it right and you catch a bad process while it’s made one part, not ten thousand. People line it up against PPAP, but PPAP validates the whole production system – and an FAI is often just one piece of it.
When do you need a first article inspection?
Anything that could change the part triggers one. Typically:
- Before the first run – to prove the process can make a conforming part at all.
- After a design change – any tweak to geometry, material or tolerance resets the proof.
- New supplier, tool or process – a changed source or method has to be re-validated.
- After a long break – a process that’s sat idle gets re-proven before restart.
- On request – a customer or standard can simply require a fresh one.
FAI or PPAP – where’s the line?
Scope. An FAI proves one part matches its drawing. The production part approval process (PPAP) proves the whole system that makes it – process controls, capability studies, a full document pack. In automotive and other regulated work, an FAI is usually one element inside a PPAP submission, not a rival to it.
What goes in an FAI report?
The report is the traceable proof of conformity. It usually carries:
- Dimensional results – every characteristic measured against the drawing, with actuals.
- Material and spec checks – certificates for the right material and treatment.
- Critical characteristics – the key features verified with extra care.
- Process review – proof the documented process made the part.
- Standard forms – AS9102 in aerospace, or whatever the customer asks for.
FAI vs PPAP vs FAT at a glance
Three quality gates that get tangled, split by scope.
| Aspect | First Article Inspection (FAI) | PPAP | Factory Acceptance Test (FAT) |
|---|---|---|---|
| Proves | One first part vs drawing | The whole production system | Equipment before shipment |
| Scope | Part-level | System-level | Equipment-level |
| Trigger | New or changed part | New part approval | New or modified equipment |
| Home turf | Aerospace, general mfg. | Automotive supply chain | Plant and machinery |
| You end with | FAI report (e.g. AS9102) | PPAP package | Signed FAT protocol |
Free FAI Report Builder (AS9102-style)
It turns a ballooned drawing into a numbered characteristic list and flags anything out of tolerance before the customer sees it. Download the checklist (PDF). You can also complete the checklist digitally in flowdit on your phone, tablet or PC.
Related Terms
- Quality Assurance – the discipline an FAI serves.
- Advanced Product Quality Planning – the planning frame around PPAP.
- IATF 16949 Certification – the automotive standard behind PPAP.
- Visual Inspection – one check type inside an FAI.
- Control Chart – watches the process once it’s approved.
Further Reading
- QMS-Software – digital quality management
