# CNC Machining First Article: What a FAIR Must Contain

> What must a CNC machining FAIR include? Learn how to approve it and handle failures. Precision Advanced Manufacturing delivers inspection-ready parts.

**Published:** 2026-05-22 | **Updated:** 2026-10-22 | **Author:** precision
**URL:** https://precisionam.com/articles/quality-compliance/cnc-machining-first-article/
**Type:** post

**Categories:** Quality Compliance

![CNC Machining First Article: What a FAIR Must Contain](https://blog.precisionam.com/wp-content/uploads/sites/56/2026/05/1779022379318-64e8d75622a8-1024x572.jpeg)

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## Content

*Last updated: October 21, 2026*

## Key Takeaways

- A CNC machining first article is the first production-representative part, verified characteristic by characteristic before batch release. The resulting FAIR is the approval document buyer-side quality engineers sign off on.
- A complete FAIR includes a ballooned drawing with sequential characteristic numbers, AS9102 Forms 1-3 with actual measured values, calibration records for every instrument and material certifications traceable to the lot.
- The buyer review workflow follows a defined sequence: confirm drawing revision, reconcile balloon count, verify calibration records, check material certifications and issue written disposition of approve, conditionally approve or reject.
- When a first article fails, the process requires a nonconformance report, root cause analysis, corrective action and a delta or full re-FAI before production can be released.
- Precision Advanced Manufacturing operates under AS9100D, ISO 9001:2015 and ITAR-registered quality systems, delivering FAIR packages with full material traceability that support efficient buyer approval.

[Request a CNC first article quote from Precision Advanced Manufacturing](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=cnc-machining-first-article)

## What a CNC Machining First Article Inspection Verifies

A first article inspection verifies that a representative part from the first production run conforms to every characteristic on the drawing and every requirement in the specification. [It validates the production process itself](https://conquestseal.com/guides/as9102-first-article-inspection), which is a different question from lot acceptance.

Verification runs across three categories.

- **Dimensional and geometric conformance.** Every linear dimension, diameter, radius, angle, GD&T callout and surface finish requirement is measured and recorded.
- **Setup and fixturing verification.** The part is produced with production tooling, production equipment and the operators who will run the job. A part made on prototype tooling does not qualify.
- **Material and traceability verification.** Raw material specifications, heat and lot numbers, mill test reports and special-process certifications are confirmed against drawing callouts.

Inspection runs through three stages. In-machine and bench inspection use micrometers, calipers, height gauges, thread gauges and pin gauges to catch gross deviations early. CMM verification with touch probe and laser scanning confirms positional tolerances and complex geometry. The FAIR becomes the documented record tying every measured result to a calibrated instrument and a specific drawing characteristic. [Skipping a stage creates downstream risk](https://wootz.work/post/first-article-inspection), because a bench check that passes a diameter can miss a positional error that only a CMM program will catch.

![A CMM touch probe measuring a machined aluminum bracket.](https://cdn.aigrowthmarketer.co/1785164194032-a09872ce26c4.webp)**Every critical dimension is verified — CMM inspection and controlled quality workflows produce first-article and in-process data you can trace to each part.**

## What Must a First Article Inspection Report Include?

A complete FAIR contains the following, one entry per characteristic.

1. Ballooned drawing characteristic number
2. Nominal dimension
3. Upper and lower tolerance limits
4. Actual measured value (numeric, not a word)
5. Instrument used, with gauge ID and calibration due date
6. Pass or fail result
7. Inspector name and date
8. Material certification reference (heat or lot number, mill test report number)
9. Specification or standard reference

Each field serves the reviewer directly. The characteristic number links the measurement to the ballooned drawing, and the actual measured value shows process margin that a pass notation hides. [Calibration ties both together](https://cadnexa.com/blog-first-article-inspection-checklist-turned-parts.html), because a sticker expired by even one day invalidates every measurement taken with that instrument. The material certification reference closes the traceability chain from raw stock to finished feature. A missing field in any row is a legitimate basis for rejection.

The actual-value field is where submissions most often fail. Under [AS9102 Rev C](https://gndctl.com/resources/how-to-fill-out-as9102-forms), writing “Pass” instead of an actual measured value where variable data exists is one of the most common rejection causes. Variable characteristics require actual measured values.

[Get a FAIR-ready quote for a CNC first article](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=cnc-machining-first-article)

## How a Drawing Is Ballooned for First Article Inspection

Ballooning assigns a unique sequential number to every design characteristic on a controlled copy of the released drawing. Every dimension, tolerance, GD&T feature control frame, surface finish callout, thread specification, material note and requirement-bearing general note receives its own balloon. Each balloon number maps to exactly one row on AS9102 Form 3, and each Form 3 row points back to exactly one balloon for [bidirectional one-to-one traceability](https://app.qualityengineer.ai/blog/characteristic-accountability-as9102).

Characteristic numbering must be sequential with no gaps and no duplicates. [Balloon numbering continues sequentially across multiple drawing sheets](https://cadnexa.com/blog-as9102-balloon-drawing-dimensional-results-linking.html) rather than restarting at 1 on each page. A hole with a diameter, a position tolerance and a surface finish callout takes three balloons. Reference dimensions marked REF are not characteristics and are not ballooned as Form 3 entries.

A missing balloon or an untraced note is a red flag for the reviewer. [General notes such as “break all sharp edges” count as characteristics](https://blog.qa-report.com/blog/as9102-requirements), and omitting them is a nonconformance under AS9102 Rev C. The reconciliation check is simple. The highest characteristic number on Form 3 must equal the total balloon count on the marked drawing. A mismatch means a missed characteristic.

A delta FAI preserves the original characteristic numbering. New characteristics are appended at the end of the sequence. [Renumbering the entire print after a revision severs traceability](https://tandem.inc/resources/guides/as9102-first-article-inspection-keeping-fais-valid-after-changes) between the original FAI and the delta, which makes it impossible for a customer to audit the change history years later.

## How to Review and Approve a First Article Inspection Report

A buyer-side FAIR review follows a defined sequence.

1. **Confirm drawing revision.** Form 1 must match the purchase order drawing revision exactly. A revision mismatch is the single most common cause of FAI rejection on first-pass review.
2. **Reconcile balloon count.** Count the balloons on the marked drawing and count the Form 3 rows. They must be equal with no gaps in the numbering sequence.
3. **Verify instrument calibration records.** Every gauge ID and calibration due date must be recorded. An expired calibration invalidates the measurement.
4. **Check material certifications on Form 2.** Specification revisions on certificates must match the drawing callout exactly. Special process suppliers must appear on the customer approved-source list. Every row must carry a traceable certificate number because “on file” is not a certificate number.
5. **Review Form 3 results.** Every variable characteristic must show a numeric actual value. Key and critical characteristics flagged on the drawing must be flagged in the Characteristic Designator column. A missing flagged key or critical characteristic is a hard rejection.
6. **Confirm reviewer and approver separation.** [Under AS9102 Rev C, the person reviewing the FAIR cannot be the person approving it.](https://gndctl.com/resources/how-to-fill-out-as9102-forms)
7. **Issue written disposition.** Approve, conditionally approve or reject.

A conditional approval must specify the affected characteristics, require documented corrective action addressing the root cause and require re-verification of those characteristics before production release. [A complete Form 3 plus the ballooned drawing establishes the traceability chain](https://cadnexa.com/blog-how-to-read-as9102-fai-report.html): design characteristic, measurement result, calibrated equipment. A break anywhere in that chain justifies withholding approval.

Generic explainer content and software-first metrology pages describe what a FAIR is but do not walk a reviewer through this decision sequence. That distinction matters when a program schedule is running and a nonconformance disposition must be made within the current build window.

A supplier that builds its FAIR package around this decision sequence shortens review time. Precision Advanced Manufacturing structures its submissions that way, operating under the certifications noted in the conclusion and serving aerospace, defense, space and UAV programs from its U.S. manufacturing sites.

## AS9102 First Article Inspection vs. Commercial FAI

[SAE published AS9102C, “Aerospace Series — First Article Inspection Requirements,” in June 2023.](https://cartograph.ai/blog/first-article-inspection) It is the version customer auditors and registrars now expect on any new FAI submission. AS9102 Rev C applies when a purchase order, quality clause or customer specification invokes it. In practice, nearly every aerospace OEM flows AS9102 down through purchase orders. [AS9100D clause 8.5.1.3 requires verification that production processes can consistently produce conforming products](https://fedlaws.org/as9102-fair-requirements-forms-ballooning-and-rev-c-changes), and AS9102 provides the standardized method.

![A commercial airliner in flight against a blue sky.](https://cdn.aigrowthmarketer.co/1785164215115-cf050b902241.webp)**Aerospace manufacturing for flight-critical hardware — machined and fabricated to AS9100D with the traceability and repeatability commercial airframe programs depend on.**

A commercial FAI without aerospace flowdown still owes the buyer the same core evidence. The package still needs a ballooned drawing, measured results with actual values, material certifications and calibration records. The forms may differ, but the traceability obligation remains.

**Full FAI vs. Partial or Delta FAI.** A full FAI documents every applicable characteristic across AS9102 Forms 1, 2 and 3 and is required for a new part number, a new supplier or a first production run. A partial FAI, commonly called a delta FAI, covers only the characteristics affected by a specific change and references the baseline FAI for everything else. [Delta FAI triggers include a design change, a process or tooling change, a new manufacturing location, a new sub-tier supplier for a material or special process, NC program changes and a production lapse of two or more years.](https://fedlaws.org/as9102-fair-requirements-forms-ballooning-and-rev-c-changes) Form 1 must state the reason for either a full or partial FAI, and this field is mandatory under Rev C for both types.

[A two-year production lapse is measured from completion of the last production operation to the actual restart of production](https://cartograph.ai/blog/first-article-inspection), not from the buyer last receipt date. [That lapse typically triggers a full FAI](https://irecruit.co/insights/dcma-fai-as9102-first-article-inspection-defense-programs) covering all characteristics and tooling. Defense programs may also require DCMA QAR concurrence, though the standard allows a documented partial FAI where justified.

### First Article Inspection vs. In-Process Inspection

A first article inspection validates the production process on a representative part before the batch is released. In-process inspection confirms the process remains stable during production. The two serve different control functions and neither substitutes for the other.

[Get a CNC production quote that includes FAI and in-process inspection](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=cnc-machining-first-article)

## What Happens When a CNC First Article Fails

A failed first article is treated as an incomplete FAI, not simply a rejected part. [The out-of-tolerance characteristic is recorded on Form 3 with the nonconformance document reference number, and Form 1 Field 19 is marked to indicate the FAI contains documented nonconformances.](https://legalclarity.org/as9102-forms-1-2-3-first-article-inspection) The FAI stays incomplete until corrective action is implemented and re-verification clears the affected characteristics.

The procedural sequence after a failure follows a consistent pattern.

1. **Issue a nonconformance report (NCR).** Record the actual measured value. Do not round toward acceptance or silently correct before resubmission.
2. **Conduct root cause analysis.** Typical causes in CNC machining include tool wear, a fixturing problem or a CNC program error. The corrective action must address the process cause, not just sort or reinspect parts.
3. **Disposition the nonconforming part** through the Material Review Board as rework to drawing, repair with engineering rationale or scrap with documented destruction.
4. **Implement corrective action** and produce a new first article.
5. **Perform a delta FAI** covering the affected characteristics on the corrected part. If the corrective action changes the manufacturing process broadly, such as a new fixture design or revised heat-treat cycle, a full re-FAI may be required.
6. **Resubmit for customer review.** Production remains blocked until the resubmission is approved.

[Production is normally blocked after a failed first article until the nonconformance is resolved.](https://wootz.work/post/first-article-inspection) A supplier documentation and traceability discipline determine how fast that resolution happens. A supplier with disciplined traceability resolves a nonconformance faster because the root cause is already documented.

FAI requirements also belong in the quote itself, so the cost and inspection scope are agreed before the run. For guidance on building an accurate quote that accounts for FAI requirements from the start, see [How To Get an Accurate Precision CNC Machining Quote](https://precisionam.com/articles/precision-cnc-machining-quote/?utm_source=ai-growht-agent&utm_term=cnc-machining-first-article).

## Frequently Asked Questions

**When Is a Laser Scanning CMM Preferred Over a Touch Probe for First Article Inspection?**

Touch probes deliver high accuracy on discrete point measurements such as bores, datums and positional callouts and are the standard for tight-tolerance features. Laser scanning captures dense point clouds across complex surfaces and freeform geometry quickly, which makes it useful for profile tolerances and contoured aerospace components. The measurement method must match the tolerance. A tight positional callout typically requires touch probe verification, while a broad surface profile may be efficiently captured by laser scanning. Both methods must be supported by calibration records traceable to a national standard.

**Who Signs Off on a FAIR Under AS9102 Rev C?**

The supplier inspection function signs Form 1, which locks all three forms under Rev C. [The person who verifies the FAIR (Form 1 Field 20) must be different from the person who approves it (Form 1 Field 22).](https://cartograph.ai/blog/first-article-inspection) [The customer records approval in Field 24 when the purchase order requires submission.](https://cartograph.ai/blog/first-article-inspection) An unsigned Form 1 is not a valid FAI record.

**How Long Does a FAIR Remain Valid?**

A FAIR remains valid as long as the part number, drawing revision, manufacturing source, process, tooling, material and location remain unchanged and no production lapse trigger has occurred. A repeat order for the same part at the same revision under the same approved process does not require a new FAIR. The FAIR is invalidated by any of the Section 4.6 triggers listed above. Record retention is governed by the applicable contract and regulation, and [aerospace contracts commonly specify ten years or longer](https://fedlaws.org/as9102-fair-requirements-forms-ballooning-and-rev-c-changes).

**Must a First Article Inspection Be Repeated After a Process Change?**

Yes, when the change affects fit, form or function. [AS9102 Rev C Section 4.6 requires a documented evaluation whenever the manufacturing source, process, inspection method, tooling, material or location changes.](https://cartograph.ai/blog/first-article-inspection) The evaluation determines whether a full FAI, a partial or delta FAI or no new FAI is appropriate. The evaluation record itself is a required artifact. A change assumed to be minor, such as relaxing a non-critical chamfer, should be checked against customer flowdown requirements before skipping a delta FAI.

**What Should a Buyer Do if the FAIR Arrives Incomplete?**

The buyer should issue a written rejection identifying each specific gap such as a missing balloon, blank Form 3 field, expired calibration record, missing material certificate or revision mismatch. The buyer should avoid accepting a package with open conditions and assuming they will be resolved later. The written disposition should state what is required for resubmission and whether any production activity is authorized in the interim. An FAI with an open nonconformance stays incomplete under AS9102, and whether early parts can ship depends on the customer written agreement and the contract.

**Is a CNC Machining First Article Required for Every New Part and Every New Supplier?**

A full FAI is required for every new part number on its first production run and for every new supplier producing an existing part number, because a partial FAI requires the unchanged characteristics to still come from the original processes, which a new source cannot demonstrate. [AS9102 Rev C removed the exemption for one-off production runs](https://cartograph.ai/blog/first-article-inspection), so a first article inspection should be planned for single-run parts when AS9102 is flowed down. Standard catalog and unmodified COTS items are listed on Form 1 of the next-level FAI rather than receiving their own report.

## Conclusion and Next Steps

A CNC machining first article is a process-verification decision. The FAIR stands or falls on four things: a ballooned drawing, measured values on Forms 1-3, calibration records and material traceability. The approval workflow runs from drawing revision confirmation through balloon reconciliation, calibration verification, material certificate review and written disposition. When a first article fails, the path is NCR, root cause analysis, corrective action and a delta or full re-FAI before production release.

Precision Advanced Manufacturing operates under AS9100D, ISO 9001:2015 and ITAR-registered quality systems, with tight-tolerance multi-axis CNC machining at its Anaheim, California and Texas manufacturing sites and complete FAIR documentation with full material traceability.

![A satellite orbiting above the Earth.](https://cdn.aigrowthmarketer.co/1785164232174-7d0cbe7ee84c.webp)**Space-grade components tolerate no rework in orbit. Precision machining and controlled processes deliver the reliability satellite and launch programs build on.**

Next steps are straightforward. Request a sample FAIR package, confirm the applicable standard and flowdown requirement and align on inspection and documentation requirements before the first article run.

[Get a CNC machining quote that includes FAIR documentation](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=cnc-machining-first-article)

## Read Next

- [First Article Inspection for Aerospace CNC: An AS9102C Guide](https://precisionam.com/articles/first-article-inspection-aerospace-cnc/)
- [First Article Inspection in Aerospace CNC Machining](https://precisionam.com/articles/first-article-inspection-aerospace-machining/)
- [Precision CNC Inspection: Tolerances, SPC & AS9102 FAI](https://precisionam.com/articles/precision-cnc-machining-inspection-requirements/)
- [Aerospace CNC Machining Inspection Reports Explained](https://precisionam.com/articles/aerospace-cnc-machining-inspection-reports/)
- [CNC Inspection Reporting Austin: Buyer Guide to Compliance](https://precisionam.com/articles/cnc-inspection-reporting-austin/)

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---

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## Citations

- [How To Source ITAR CNC Machining in Austin: A Buyer Guide](https://precisionam.com/articles/quality-compliance/verify-itar-cnc-machining-austin/)
- [How To Submit an ITAR CNC Machining RFQ: Step-By-Step](https://precisionam.com/articles/quality-compliance/itar-cnc-machining-rfq/)
- [CNC Traceability: The Complete Record Chain Guide](https://precisionam.com/articles/quality-compliance/precision-cnc-traceability-system-guide/)
- [ITAR Compliant CNC Machining Suppliers: How to Shortlist](https://precisionam.com/articles/quality-compliance/vet-itar-cnc-supplier-checklist/)
- [How To Verify ITAR Registered CNC Machine Shops](https://precisionam.com/articles/quality-compliance/verify-itar-cnc-machine-shops/)

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