What is first article inspection?

A complete, documented verification that the first part produced by a new or changed manufacturing process conforms to every design requirement: all dimensions, notes, materials, and special processes. It is performed on a part made with production tooling and methods, and it produces an evidence package called the first article inspection report (FAIR).

When is a first article inspection required?

Under AS9102, for a new part entering production, any change affecting form, fit, or function (design revision, new tooling, process change, new source or location), and after a production lapse of two years. A partial FAI covering only affected characteristics is allowed for changes. Outside aerospace, the same triggers are sound practice, and customers often require FAI contractually.

What is the difference between FAI and PPAP?

FAI is aerospace's production process verification, defined by AS9102, centered on complete characteristic-by-characteristic verification of a first part. PPAP is automotive's broader part-approval package, which includes dimensional results and sample parts (the FAI-like elements) plus process FMEA, control plans, capability studies, and more. Same intent, different scope and paperwork.

What are the three AS9102 forms?

Form 1, part number accountability: identifies the part, revision, and what triggered the FAI. Form 2, product accountability: raw materials, special processes, and functional testing with their certifications. Form 3, characteristic accountability: every ballooned characteristic with its requirement, actual result, and verdict.

What is the difference between a full and partial FAI?

A full FAI verifies every characteristic on the drawing, required for new parts and after long production lapses. A partial FAI re-verifies only the characteristics affected by a specific change, such as a revised dimension or a new plating source, and leans on the previous full FAIR as its baseline.

Does a passed FAI mean the process is capable?

No. An FAI is a sample of one: it proves the process can produce a conforming part, not that it will do so consistently at volume. Ongoing consistency is demonstrated with statistical process control and capability indices like Cpk, which is why customers commonly require both an FAIR and capability evidence on key characteristics.

First Article Inspection: What FAI Proves and How to Run One

Q: What is a ballooned drawing?

The design drawing with every requirement circled and given a unique number, so each characteristic has an address. Each balloon number corresponds to one row of the FAI characteristic list, which records the requirement, the measured result, and the measurement tool, making full coverage auditable.

Every balloon gets a result, every claim gets a record, before the process earns trust.

First article inspection (FAI) is the complete, documented verification of the first part produced by a new or changed manufacturing process, checking every drawing characteristic, material, and special process against design requirements. It proves the production process, run as planned, can make a conforming part, and it produces an evidence package called the FAI report (FAIR).

The name undersells it. FAI is not "inspect the first part off the line a bit harder." It is a one-time, full-coverage audit of everything the design requires, performed on a part made by the actual production process: production tooling, production methods, production operators. Aerospace formalized it, but any plant launching a new part, a new supplier, or a big process change gets the same protection from the same discipline.

What does an FAI actually prove?

Three things, each of which routine inspection never checks again:

The design data made it into the process. Every dimension, note, material callout, and spec flag on the drawing is accounted for, measured or verified, one by one. Routine inspection samples a handful of characteristics; FAI covers all of them exactly once.
The process, not an artisan, made the part. Because the first article comes from production tooling and methods, conformance is evidence the process can repeat it. A beautiful part hand-finished by the toolmaker proves nothing; that is why process changes re-trigger FAI.
The paper trail is real. Material certs match the specified alloy and temper, special processes (heat treat, plating, welding, NDT) were performed by qualified sources, and test results exist. Much of an FAI is verifying documents, not measuring metal.

One honest boundary: an FAI is a sample of one. It demonstrates the process can produce a conforming part, not that it always will; ongoing consistency is the job of statistical process control and capability studies which is why aerospace treats FAI as the entry ticket, not the whole quality case.

When is an FAI required?

In aerospace, the reference is SAE's AS9102 the industry's FAI requirement (current revision C, published June 2023). Its trigger logic is a sensible default for any industry:

A new part or assembly entering production for the first time.
A change that can affect form, fit, or function: design revision, new or moved tooling, a process or inspection-method change, a new manufacturing source or location.
A lapse in production two years under AS9102, on the logic that dormant processes, tooling, and skills drift.
A partial FAI covers only the characteristics affected by a change, so a revised hole pattern does not force re-verifying an unchanged casting profile.

The companion requirement, AS9100 clause 8.5.1.3, requires production process verification, implemented in practice as FAI per AS9102 for organizations certified to the aerospace QMS standard. Outside aerospace, the same idea appears as the dimensional-results and sample-part elements of automotive PPAP (AIAG, Production Part Approval Process), and unregulated shops run FAIs simply because launching a part without one means discovering process gaps in month three, one NCR at a time.

How to run an FAI in 7 steps

Plan it before the first chip flies. Identify the trigger (new part, change, lapse), decide full or partial scope, and confirm the design data set: drawing revision, model, specs, and any customer FAI requirements beyond the standard.
Balloon the drawing. Assign a unique number to every characteristic on the drawing: dimensions, tolerances, notes, material and process callouts. Each balloon becomes one row of the characteristic accountability list, which is what makes "every requirement" auditable instead of aspirational.
Produce the part with the production process. Production tooling, production parameters, production work instructions, a production operator. Any shortcut here quietly converts the FAI into fiction.
Gather the evidence upstream of measurement. Material certifications against the specified spec, special-process certs from qualified processors, test reports, and the traceability linking them to this part.
Measure and record every ballooned characteristic. Each balloon gets an actual result: a measured value with its tooling listed, or verification evidence for notes and callouts. Out-of-tolerance results get documented like any nonconformance, dispositioned, and the FAI does not pass until resolved.
Compile the FAIR. In AS9102 terms: Form 1 (part number accountability: what part, what revision, what triggered the FAI), Form 2 (product accountability: materials, special processes, functional tests), Form 3 (characteristic accountability: every balloon, its requirement, its result). Attach the ballooned drawing and certs.
Review, approve, and file where the next person can find it. Quality reviews for completeness and conformance, signs, and the package becomes the baseline the next partial FAI, customer audit, or supplier qualification builds on.

The FAI flow. Nothing passes on promises; every balloon needs a recorded result, and failures loop back before approval.

What is a ballooned drawing?

A ballooned drawing is the design drawing with every requirement circled and numbered, so each characteristic has an address. Balloon 7 on the drawing is row 7 on Form 3, which shows the requirement (say, ⌀6.35 ±0.05), the measured result (6.37), the tool that measured it, and the verdict. The balloons turn "we checked everything" into a claim an auditor can test in thirty seconds by picking a number and following it.

Ballooning in concept: every requirement gets an address, every address gets a result.

What goes in the FAI package?

The FAIR that survives a customer audit contains: the three AS9102 forms (or your industry's equivalent), the ballooned drawing at the correct revision, raw material certifications, special-process and test certifications from qualified sources, measurement results traceable to calibrated equipment, and records of any nonconformance dispositioned along the way. The facts on the standards side, for the stat-minded:

AS9102 Revision C, the current aerospace FAI requirement, was published by SAE in June 2023, tightening alignment with AS9100's production process verification clause (SAE AS9102).
The standard defines the three-form FAIR structure: Form 1 part number accountability, Form 2 product accountability, Form 3 characteristic accountability (SAE).
AS9102 also drives re-accomplishment: changes affecting form, fit, or function, and lapses in production of two years, trigger full or partial FAI (SAE AS9102).

FAI beyond aerospace

Strip away the form numbers and FAI is simply launch discipline: prove the process before trusting it. Job shops run FAIs on every new PO because the customer's drawing is the contract. Automotive suppliers meet the same need inside PPAP, where dimensional results and sample parts serve the FAI role. Food and CPG plants run the equivalent on new lines and formats: first-case checks against spec before a full run. If you buy parts rather than make them, requiring an FAI from new suppliers is one of the cheapest escapes-prevention tools available, and the FAIR becomes the reference point for every later nonconformance argument about what "good" was supposed to look like.

The pain of FAI is clerical, not conceptual: hundreds of characteristics, each needing a requirement, a result, a tool, and a cert, assembled from measurement data scattered across CMM reports, lab results, and supplier PDFs. That assembly is exactly the kind of paperwork that benefits from being captured digitally once and compiled automatically, the problem Harmony's paperwork digitization and AI search modules were built for on plants' existing systems, working alongside the QMS rather than replacing it. However the package gets built, the standard's demand is constant: every characteristic accounted for, every claim backed by a record, before the process earns the right to run unsupervised.