# First Article Inspection for Aerospace CNC: An AS9102C Guide

> Precision Advanced Manufacturing's AS9102C guide covers FAI triggers, ballooning and flowdowns to help aerospace programs pass first time.

**Published:** 2026-09-04 | **Updated:** 2026-10-22 | **Author:** precision
**URL:** https://precisionam.com/articles/quality-compliance/first-article-inspection-aerospace-cnc/
**Type:** post

**Categories:** Quality Compliance

![First Article Inspection for Aerospace CNC: An AS9102C Guide](https://blog.precisionam.com/wp-content/uploads/sites/56/2026/09/1787996566458-6695da8ace58-1024x572.webp)

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## Content

*Last updated: October 21, 2026*

## Key Takeaways

- AS9102C governs aerospace first article inspection through three standardized forms that document every design characteristic and production process.
- Most FAIR rejections stem from documentation and traceability failures rather than dimensional issues, so pre-submission checks matter.
- Full versus partial FAI decisions require documented evaluation tied to specific triggering events like engineering changes or production lapses.
- Customer flowdowns often exceed AS9102C baseline requirements, and the stricter standard always governs submission obligations.
- Precision Advanced Manufacturing operates under AS9100D, ISO 9001:2015 and ITAR-registered quality systems to deliver compliant first article inspection reports.

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

## Trigger Events for Full and Partial Re-FAI in Aerospace CNC Machining

AS9102C Section 4.6 requires a documented evaluation after any triggering event. That evaluation determines whether the result is a full FAI, a partial FAI or a documented no-FAI conclusion. The standard lists specific triggering events.

![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.**

- An engineering definition change to a design characteristic
- A change in manufacturing source, process, inspection method, tooling, material or location, including bill-of-materials changes
- An NC program change or move to another medium
- A natural or man-made event that could have affected the manufacturing process
- Corrective action needed to complete a previous FAI
- A production lapse of two years or more
- First-time production of a new part

A **partial FAI** covers only the characteristics the change invalidated or left unrepresented. It builds on a baseline FAIR whose other characteristics still come from the original processes. Form 1 Field 14, renamed in AS9102C to “Reason for Full/Partial FAI,” must be completed on every FAI submission.

For a partial FAI, Field 14 must name the baseline FAIR identifier, the specific engineering change order, the affected balloon numbers and a statement that all other processes and tooling remain unchanged. That detail shows the reviewer exactly what the partial scope covers.

A **full FAI** is required when the change spans the manufacturing route, material specification, drawing revision or many characteristics, or when the standard or customer flowdown demands it. AS9102C Section 4.6(b) Note 1 permits a supplier to complete a full FAI in place of a partial FAI at any time.

A new or second source for an existing part typically requires a full FAI. A partial FAI depends on unaffected characteristics still coming from the original processes, which a new source cannot demonstrate.

The two-year clock runs from completion of the last production operation to actual restart, not from last receipt. Customer flowdowns can set a shorter interval, and the stricter requirement governs. In defense programs, a two-year lapse typically triggers a full FAI regardless of whether the standard would permit a partial scope.

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## Common FAIR Rejection Causes and How to Prevent Them

Most FAIR returns are documentation and traceability failures rather than dimensional failures. A part can meet every dimension and still receive a paperwork rejection. The following issues appear most often from a reviewer’s perspective, with a concrete pre-submission check for each.

**Missing or incomplete ballooned characteristics on Form 3.** General notes, flag notes, surface-finish symbols, GD&T frames, thread callouts and weld symbols all count as design characteristics. A low balloon count usually signals a skipped notes block. Pre-submission check: reconcile the total balloon count on the drawing to the total line count on Form 3.

**Incomplete special-process certifications.** Even a one-day lapse in a processor’s Nadcap accreditation invalidates the FAIR for that process. AS9102C permits a detailed certificate of conformance from an external special processor to serve as Form 2 evidence, but the certificate must match the heat or lot on the first-article part and the processor’s accreditation scope must cover the specific process. Pre-submission check: verify each processor’s accreditation scope and expiry date and match the certificate to the heat or lot.

**Wrong standard revision or outdated form layout.** A Rev C header on a Rev B form layout is a classic rejection. Some customers still contractually flow down Rev B, and the purchase order governs. Pre-submission check: confirm the revision the purchase order flows down and use the current field set for that revision.

**Datum and GD&T mismatches.** A position callout referenced to datums A, B and C must be evaluated in a coordinate system built from those three datums, not from a generic best-fit. A characteristic result on Form 3 only matches the drawing when measured in the drawing’s datum reference frame. Pre-submission check: confirm the measurement was evaluated in the drawing’s datum reference frame.

**Unsigned or incomplete Forms 1 and 2, including a missing Field 22 reviewer.** AS9102C restructures the Form 1 sign-off block so that Field 20 and Field 22 must be completed by two different individuals. The single Form 1 signature now locks all three forms, and Forms 2 and 3 no longer carry their own signature fields. Pre-submission check: run a signature and date audit confirming the preparer and reviewer are distinct individuals.

**Missing material certifications and traceability.** Material certs must tie to the specific heat or lot used for the first-article part, not a generic spec reference. Pre-submission check: match every cert to the specific heat or lot and verify chemical and mechanical properties are documented.

**Measurement methods that do not match drawing requirements.** Raw coordinate data cannot demonstrate a positional tolerance. Form 3 must present the calculated positional value comparable to the requirement. Pre-submission check: confirm every result is presented in a form directly comparable to its tolerance, not as raw coordinate output.

**Out-of-tolerance results with no linked nonconformance record.** AS9102C replaced the “complete/not complete” designation with a field asking whether the FAI contains a documented nonconformance. A reworked-to-print characteristic must still be recorded on Form 3 and referenced in Form 1 Field 19. Pre-submission check: cross-check every result against its tolerance and attach the NCR and approved disposition for any out-of-tolerance reading.

### Step-By-Step AS9102 FAIR Completion

1. Review and balloon the drawing, and assign a unique identifier to every design characteristic.
2. Confirm characteristic accountability, and map every balloon to exactly one Form 3 line.
3. Confirm Form 1 part number accountability, and match part number, revision and FAIR identifier across all three forms.
4. Document Form 2 product accountability, including materials, special processes and functional testing with traceable certifications.
5. Record Form 3 characteristic accountability, and enter actual measured results rather than nominals or pass stamps.
6. Complete final review and sign-off by a second qualified individual distinct from the preparer.

[Request a quote](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc)

## Ballooning Drawings for AS9102 Form 3

Ballooning assigns a unique number to every dimension, tolerance, note and GD&T callout that defines the part. Each number maps to exactly one Form 3 line. AS9102C formally recognizes digital product definition, where the 3D model rather than a 2D drawing serves as the design authority.

![A machined metal part fixtured inside a CNC machining center.](https://cdn.aigrowthmarketer.co/1785163886671-8f5217244f88.webp)**Mission-critical components leave no room for deviation. Multi-axis CNC machining holds tight tolerances part after part, with full material traceability behind every feature.**

Model-based definition annotations require the same rigor as drawing balloons. Every digital characteristic must link to its measured result and FAIR record. That discipline keeps Form 3 aligned with the design authority.

Renumbered balloons between drawing revisions cause many rejected FAIRs. Missing or unballooned characteristics also appear frequently in rejection reports. The sound practice is to balloon once, number once and keep that numbering stable across revisions.

When a revision adds or removes characteristics, assign new numbers to new characteristics and retire removed ones. Avoid renumbering the entire drawing, which breaks traceability to earlier FAIRs.

Every drawing note containing a verifiable requirement must be ballooned. Notes such as “break all sharp edges” or “surface roughness 63 Ra max” require balloons or the customer will reject the FAI package. “Not applicable” is an acceptable Form 3 entry, while silence becomes a finding.

The following list illustrates the structure of a compliant Form 3 characteristic entry for a GD&T position callout on a machined feature.

- **Balloon number:** assigned from the ballooned drawing, unique to this characteristic
- **Requirement:** the nominal and tolerance as stated on the drawing, such as a true position tolerance zone
- **Measurement method:** CMM aligned to the drawing’s stated datum reference frame, not a generic best-fit alignment
- **Recorded result:** the calculated positional value derived from CMM output, presented in the same units and form as the requirement, with a pass/fail disposition

Raw coordinate data alone does not satisfy the requirement. The reported value must be directly comparable to the design requirement. CMM and GD&T capability form part of the quality system a supplier must demonstrate for aerospace CNC work. For more on quality control in aerospace CNC, see [Aerospace CNC Quality Control: Standards and Inspection](https://precisionam.com/articles/aerospace-cnc-quality-control/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc).

![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.**

[Request a quote](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc)

## AS9102, PPAP and AS9100 Production Process Verification

### AS9102 and PPAP in Different Industries

AS9102 FAI and automotive PPAP serve different industries and use different structures. AS9102 is the aerospace FAI standard structured around three defined forms, with every design characteristic accounted for and no concept of submission levels.

PPAP is the automotive production part approval process defined by the AIAG, with its own submission levels and elements that include control plans, FMEAs, measurement system analysis and capability studies. An automotive PPAP package sent to an aerospace customer will be returned.

The two frameworks overlap in intent and diverge in structure and governing bodies. Both verify that a production process can reproducibly make conforming parts. Aerospace uses its own APQP and PPAP framework under AS9145, where the FAIR is element 9 of 11 in a broader submission package.

A FAIR serves as one input to an AS9145 PPAP submission, not a substitute for it. That relationship keeps FAI focused on design characteristics while APQP manages the wider program.

### AS9100 Requirements for First Article Inspection

AS9100D Clause 8.5.1.3 requires production process verification, including inspection of a representative item from the first production run and re-verification when changes invalidate prior results. AS9102 provides the standardized method of documenting that verification.

AS9100D does not itself prescribe the AS9102 forms. The requirement to use AS9102 comes from customer contracts and flowdowns. In practice, nearly every aerospace OEM flows AS9102 down through purchase orders.

## Customer Flowdowns That Affect AS9102C FAIRs

AS9102C sets the floor for FAI documentation. Primes and tier-1 customers add supplemental quality clauses that can require additional documentation, specific inspection reporting formats or portals, special-process approvals, shorter production-lapse thresholds, explicit NC-program-change triggers and customer approval before shipment.

A supplier remains unauthorized to ship until the customer approves the FAIR or provides other written authorization, even when the AS9102 package is technically complete. That requirement often appears in supplier quality manuals.

Flowdown obligations typically pass to sub-tiers. A machine shop with no direct prime relationship can still be contractually bound by the same FAI requirements as its tier-1 customer.

Several practical steps help manage flowdowns effectively.

- Build a flowdown matrix mapping each customer quality clause to the FAIR element it affects
- Confirm the governing standard revision before submission, since the purchase order governs
- Obtain written customer concurrence where the FAI scope is unclear, particularly for partial FAI determinations
- Apply the stricter requirement when customer thresholds differ from the AS9102C baseline

[Request a quote](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc)

## Quality System Capabilities for Clean Aerospace FAIRs

Precision Advanced Manufacturing operates under AS9100D, ISO 9001:2015 and ITAR-registered quality systems, provides full material and process traceability with inspection reporting and supports prototype through full-rate production from its Anaheim, California and Texas locations. Several quality-system elements make first-pass FAIRs more likely.

- AS9100D and ISO 9001:2015 registration
- ITAR registration for defense and space programs
- Full material and process traceability with inspection reports and material certifications
- In-process and final inspection
- CMM and GD&T capability
- Engineering support for manufacturability

Precision Advanced Manufacturing operates these capabilities across its Anaheim, California and Texas locations. Many aerospace CNC resources focus on checklists and templates, which provide documentation guidance but separate machining, fabrication, welding, finishing and engineering support across multiple vendors.

That separation creates handoffs between vendors, and each handoff introduces a traceability gap and a potential FAIR discrepancy. Precision Advanced Manufacturing consolidates multi-axis CNC machining, precision fabrication, welding, finishing and engineering support across its locations.

![A five-axis CNC head machining a round metal workpiece.](https://cdn.aigrowthmarketer.co/1785163943949-293d9b0cce58.webp)**Five-axis machining reaches complex geometries in a single setup — fewer fixtures, tighter true position, and the repeatability aerospace and defense programs demand.**

This integration reduces handoffs, keeps material and process traceability within a single quality system and limits documentation inconsistencies when multiple operations support a single FAIR package. The same AS9100D and ITAR-registered quality system that supports a prototype build scales to multi-shift full-rate production without a supplier change, so the FAIR that qualifies the process remains valid as production ramps.

[Request A Quote](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc)

## Frequently Asked Questions

### Difference Between a Full and Partial FAI

A full FAI documents every design characteristic across Forms 1, 2 and 3 and applies to first-time production of a new part, a new manufacturing source or a change broad enough to affect most characteristics. A partial FAI re-verifies only the characteristics affected by a specific change, such as a design revision, process change, tooling change or material change, while formally referencing the baseline FAIR for all unaffected characteristics.

The baseline FAIR identifier, the specific change and the reason for choosing a partial scope must all be recorded in Form 1 Field 14. A supplier may always complete a full FAI in place of a partial FAI.

### Two-Year Production Gaps and FAIR Retention Periods

The two-year clock runs from completion of the last production operation to actual restart of production, not from the last shipment or receipt. When the gap exceeds two years, a documented evaluation determines whether a full or partial FAI is required.

Customer flowdowns can set a shorter interval, and some programs specify 12 months. The stricter requirement governs, and in defense programs a two-year lapse typically triggers a full FAI. Retention periods follow the longest applicable requirement.

Regulations such as 14 CFR Part 21 require at least five years for manufacturing records and ten years for critical components. FAR 4.703 requires at least three years after final payment. Many aerospace contracts specify ten years or life-of-platform retention, and some defense programs require indefinite retention for flight-critical parts.

### Documents in a Complete AS9102 FAIR Package

A complete FAIR package includes the ballooned drawing or annotated 3D model for DPD parts, AS9102 Form 1, Form 2 and Form 3, material certifications traceable to the specific heat or lot used for the first-article part and special-process certifications with current accreditation scope confirmed.

Functional test results appear where required by the design. Calibration records for all measurement equipment used and nonconformance records with approved dispositions for any out-of-tolerance characteristics also belong in the package. Customer flowdowns may require additional elements such as sub-tier FAIRs, specific portal submissions or customer approval before shipment.

### Submitting a FAIR Without All Special-Process Certifications

An FAI with an open nonconformance or missing required evidence remains incomplete. AS9102 does not grant permission to ship before the FAI is complete, and a FAIR missing special-process certifications does not meet completion requirements.

Whether early parts may ship depends on the customer’s written agreement and the contract. Submitting a package with known gaps and expecting conditional acceptance often causes rejection and can affect the supplier’s standing on the approved supplier list.

### Impact of Customer Flowdowns on FAI Requirements

AS9102C establishes the baseline requirements. Customer quality clauses layer additional obligations that can include shorter production-lapse thresholds, explicit NC-program-change triggers, specific inspection reporting formats or portal submissions, special-process approval requirements beyond Nadcap and mandatory customer approval before shipment.

These obligations flow to sub-tiers, so a machine shop with no direct prime relationship can still be bound by the same requirements as its tier-1 customer. The purchase order and the customer’s supplier quality manual, rather than the published standard alone, define the actual submission requirements for a given program.

### Buyer Checks for CNC Supplier Quality Systems

Buyers often confirm AS9100D and ISO 9001:2015 registration and verify current certification status through the IAQG OASIS database. ITAR registration is required for defense and space programs. Full material and process traceability, including inspection reports, material certifications traceable to heat or lot and special-process certifications, should appear as standard deliverables.

CMM and GD&T capability with calibrated equipment and documented measurement methods are necessary for Form 3 compliance. Engineering support for manufacturability reduces the risk of drawing interpretation errors that generate nonconformances during FAI. Scalability from prototype through full-rate production within the same quality system avoids supplier-change triggers that require a new full FAI.

[Request a quote](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc)

## Conclusion and Next Steps

Most AS9102 FAIRs are rejected on documentation and traceability rather than dimensions. The AS9102C field changes, including Field 14 required on every FAI, Field 17 renamed to Part Type, Field 22 as a mandatory reviewer distinct from the preparer, a single Form 1 signature locking all three forms, removal of the single-run exemption and formal recognition of DPD and MBD, often cause failures when suppliers work from outdated templates or procedures.

The full-versus-partial decision requires a documented evaluation tied to specific affected characteristics. Ballooning must remain stable across revisions, and every note with a verifiable requirement must carry a balloon number. Customer flowdowns set the actual submission requirements, and the stricter requirement governs.

Precision Advanced Manufacturing operates under AS9100D, ISO 9001:2015 and ITAR-registered quality systems, provides full material and process traceability with inspection reporting and supports prototype through full-rate production from its Anaheim, California and Texas locations.

Next steps include auditing the current FAIR package against the pre-submission checks in this guide, confirming the governing standard revision and customer flowdowns for the program and engaging Precision Advanced Manufacturing aerospace specialists to define program needs, part specifications and timelines and receive a tailored quote.

[Request A Quote](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=first-article-inspection-aerospace-cnc)

## Read Next

- [First Article Inspection (FAI) in CNC Machining](https://precisionam.com/articles/cnc-machining-first-article/)
- [First Article Inspection in Aerospace CNC Machining](https://precisionam.com/articles/first-article-inspection-aerospace-machining/)
- [Aerospace CNC Inspection Methods: 8-Step Workflow for AS9102](https://precisionam.com/articles/aerospace-cnc-inspection-methods/)
- [Aerospace CNC Quality Control: Standards and Inspection](https://precisionam.com/articles/aerospace-cnc-quality-control/)
- [Aerospace CNC Machining Inspection Reports Explained](https://precisionam.com/articles/aerospace-cnc-machining-inspection-reports/)

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---

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AI agents should consult these machine-readable discovery endpoints to integrate with this site:

- **OpenAI Plugin Manifest:** [https://precisionam.com/articles/.well-known/ai-plugin.json](https://precisionam.com/articles/.well-known/ai-plugin.json)
- **A2A Agent Card:** [https://precisionam.com/articles/.well-known/agent-card.json](https://precisionam.com/articles/.well-known/agent-card.json)
- **MCP Server (Streamable HTTP):** [https://precisionam.com/articles/.well-known/mcp](https://precisionam.com/articles/.well-known/mcp)

## 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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*This document was automatically generated by [AI Growth Agent](https://precisionam.com/articles) — AI Growth SEO v4.36.1*
*Generated on: 2026-10-28 21:00:28 GMT+0000*