Last updated: June 27, 2026
Key Takeaways
- First Article Inspection (FAI) verifies that the initial CNC-machined part meets all engineering requirements before full production and produces a documented First Article Inspection Report (FAIR) per AS9102.
- FAI is mandatory for new parts, process changes, material substitutions, or supplier transitions in aerospace and defense programs and establishes a validated manufacturing baseline.
- A compliant FAIR package includes dimensional results, material certifications, tooling records and full traceability aligned with AS9100D and ITAR requirements.
- Common FAI failures, such as setup errors, tooling wear and incomplete documentation, are mitigated through pre-production checklists, calibrated inspection and disciplined process control.
- Precision Advanced Manufacturing delivers AS9102-compliant FAI services with complete documentation and scalable production support, and start an aerospace CNC program quote with the team.
First Article Inspection for Aerospace and Defense Programs
Aerospace and defense programs operate under zero-tolerance conditions for non-conformance. A single out-of-spec component can halt integration, trigger corrective action cycles and push delivery schedules weeks or months off course.
FAI establishes a documented baseline and confirms that the manufacturing process, not just the part, can produce conforming output at production rates. For supplier quality engineers and program managers, a completed FAIR serves as primary evidence that a CNC supplier has the process control to deliver consistently across a full production run.
Precision Advanced Manufacturing operates under AS9100D and ISO 9001:2015 certified quality management systems and is ITAR registered. These certifications define the inspection, documentation and traceability infrastructure that supports every first article submission.
FAI Triggers in Aerospace CNC Programs
FAI is required under several conditions common to aerospace and defense contracting.
- Initial production of a new part number
- Reactivation of a part after an extended production gap
- Change in manufacturing location, process, tooling or material
- Engineering drawing or specification revision
- Supplier change or subcontractor substitution
- Customer-directed requalification
Contract language typically references AS9102 directly or incorporates it through a customer quality requirement. Programs confirm FAI triggers with the prime contractor before production begins.
Discuss FAI requirements for an upcoming CNC machining program.
Seven-Step CNC First Article Checklist
This seven-step checklist aligns with AS9102 and reflects standard practice for CNC-machined metal components.
- Confirm drawing revision and applicable specifications before setup.
- Verify raw material certifications against the bill of materials.
- Document all tooling, fixturing and CNC program identifiers used.
- Machine the first article part under production-representative conditions.
- Perform dimensional inspection against all drawing callouts using calibrated equipment.
- Conduct functional and visual inspection per applicable workmanship standards.
- Compile and submit the FAIR package with all supporting objective evidence.
FAIR Requirements AS9102: Sample Report Outline
A compliant FAIR for CNC-machined parts includes the following elements.
- Form 1 with part number accountability and traceability data
- Form 2 with product accountability and drawing and specification references
- Form 3 with characteristic accountability and all dimensional results
- Material certifications traceable to heat and lot numbers
- Tooling and fixture records with calibration status
- Special process certifications, such as plating or heat treat, when applicable
Clear visibility into these FAIR elements clarifies how FAI differs from other quality activities that aerospace programs require.
First Article Inspection vs In-Process Inspection
FAI and in-process inspection serve distinct functions. FAI validates the process before production begins. In-process inspection monitors conformance during an active production run.
FAI functions as a qualification event and repeats when a defined trigger occurs. In-process inspection is continuous. Both are required under AS9100D and neither substitutes for the other. A supplier that performs in-process checks without a completed FAIR has not satisfied the qualification requirement.
Common CNC First Article Failures and Corrective Actions
Several failure categories appear repeatedly in CNC first article submissions and most stem from inadequate pre-production verification.
Setup and fixturing errors. Incorrect datum references or fixture offsets produce systematic dimensional deviations across many features. Because these errors affect multiple features at once, corrective action requires fixture verification and a full reinspection after adjustment.
Tooling wear or selection issues. While setup errors affect positioning, tooling problems affect feature quality. Worn or incorrect tooling produces surface finish failures, out-of-tolerance profiles and burr conditions. Tool life management and pre-run verification reduce this risk.
Material certification gaps. Missing or incomplete mill certifications rank among the most common FAIR rejection reasons. Every heat and lot must be traceable to the raw material source before machining begins.
Incomplete documentation. A dimensionally conforming part with an incomplete FAIR package still counts as a nonconforming submission. All required sections must be present and signed.
Precision Advanced Manufacturing addresses these failure modes through defined pre-production checklists, calibrated inspection equipment and a quality management system built to AS9100D requirements. In-house engineering support identifies manufacturability risks before the first chip is cut.
Scaling from Prototype to Full-Rate Production
A completed FAIR establishes the process baseline for future production. When that baseline is maintained through consistent CNC programs, tooling, materials and facility location, production parts inherit the qualification without requalification.
Precision Advanced Manufacturing supports prototype and full-rate production under one roof. Programs move from initial first article through multishift production without supplier changes, documentation gaps or process revalidation. The same certified quality system, ITAR controls and traceability records apply at every production volume.
This continuity reduces a common program risk, where a supplier passes FAI at low volume but loses process control at scale. Integrated capacity and disciplined scheduling maintain conformance from the first part to the thousandth.
Start with FAI and scale to full-rate production under one quality system.
Supplier Evaluation Framework for CNC FAI Programs
Supplier selection for FAI-required programs benefits from a structured evaluation across five dimensions.
Technical capability. The supplier demonstrates multi-axis CNC machining capacity, calibrated inspection equipment and experience with the specific materials and tolerances required by the program.
Quality and compliance. The certifications mentioned earlier, including AS9100D, ITAR registration and ISO 9001:2015, form baseline requirements for aerospace and defense work. Programs verify that certifications are current and that the quality system covers the specific processes involved.
Scalability. A supplier that can execute a first article but cannot support production ramp creates a requalification burden. Evaluation includes capacity, shift structure and production history at volume.
Integration scope. Suppliers that consolidate machining, finishing and inspection under one roof reduce handoffs and documentation gaps. Each supplier transition in a process chain introduces traceability risk.
Total cost of ownership. Unit price is one input. Rework rates, inspection burden, schedule risk and requalification costs complete the picture. A supplier with a higher unit price and a clean FAI record often delivers lower total program cost than a lower-price supplier with recurring nonconformances.
Frequently Asked Questions
What certifications does a CNC supplier need to support AS9102 FAI?
AS9100D certification is the primary quality management requirement for aerospace CNC suppliers. It incorporates FAI requirements and defines the documentation, traceability and process control standards that support a compliant FAIR. ITAR registration applies to defense and space programs. ISO 9001:2015 provides the underlying quality system framework. Precision Advanced Manufacturing holds all three.
How long does a CNC first article inspection take?
Duration depends on part complexity, the number of drawing callouts and the scope of special process certifications required. Simple turned components may complete FAI in a matter of days. Complex multi-axis machined assemblies with extensive finishing requirements take longer. Programs build FAI time into the schedule before production release.
Does a FAIR need to be repeated if the CNC program changes?
A change to the CNC program functions as a defined FAI trigger under AS9102. If the program change affects any dimension, feature or process parameter covered by the original FAIR, a partial or full reinspection is required. The scope of reinspection depends on what changed and what it affects. Documenting all program changes with revision control prevents ambiguity during audits.
How does ITAR affect FAI documentation and traceability?
ITAR controls apply to the technical data embedded in FAI packages for defense and space components. Drawing packages, inspection records and process documentation for ITAR-controlled parts must be handled, stored and transmitted under ITAR-compliant controls. Suppliers must be ITAR registered and access to controlled documentation must be limited to U.S. persons unless an export license applies. Precision Advanced Manufacturing maintains ITAR-compliant document controls across applicable programs.
Can a supplier transition happen mid-program without triggering a full FAI?
A supplier change functions as a defined FAI trigger. Transitioning to a new CNC supplier mid-program requires a new first article submission from that supplier, even if the part and drawing remain unchanged. The new supplier must demonstrate independent process capability. Precision Advanced Manufacturing supports mid-program transitions with pilot builds, complete documentation packages and engineering support to reduce schedule impact.
Next Steps for Aerospace FAI and CNC Production
Precision Advanced Manufacturing delivers AS9102-compliant first article inspection for CNC-machined aerospace and defense components. Programs receive complete FAIR documentation, full material traceability and a validated process baseline that supports seamless scaling to full-rate production under the certified quality systems described above at facilities in California and Texas.
Connect with aerospace manufacturing specialists and define FAI requirements for the next program.
