What are First Article Inspections?

In my experience, first article inspection is the single most effective checkpoint to prevent costly production errors. Before you run 10,000 parts, you need to verify that the very first one meets every specification on the engineering drawing: every dimension, every tolerance, every material requirement.

That verification is what FAI is for. It is not a formality. It is the moment you confirm that your manufacturing process is actually capable of producing what you designed.

First article inspection is used across aerospace, automotive, medical device, and defense manufacturing: anywhere that a non-conforming part carries serious consequences.

This article explains what FAI is, when it is required, how the process works step by step, what a First Article Inspection Report includes, and how FAI connects to your BOM and product data.

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What Is a First Article Inspection?

A First Article Inspection (FAI) is a formal, documented verification that the manufacturing process can consistently produce parts that conform to engineering drawings and design specifications.

The purpose is to provide objective evidence that all engineering and specification requirements are understood, achievable, and met before full-scale production begins.

FAI is not the same as routine quality inspection. Routine inspection samples parts during an ongoing production run. FAI is a one-time, comprehensive check of every characteristic on the drawing, performed on the first production part or parts before the production run is approved to proceed.

The distinction matters: FAI validates the process, not just the part.

When Is First Article Inspection Required?

FAI is required in a wider range of situations than many teams realize. The most common triggers include:

• New parts entering production for the first time: any part number being manufactured for the first time requires FAI before full production begins
• After design changes or engineering change orders: if the drawing changes, the previous FAI is no longer valid
• After manufacturing process changes: new tooling, a new supplier, a new facility, or a change in production method all require a new FAI
• Production resumption after an extended gap: most contracts specify that a gap of two or more years without production activity triggers a repeat FAI
• Customer or contract requirement: aerospace and defense contracts almost universally require FAI as a condition of production approval

A partial or “delta” FAI may be acceptable when only specific characteristics are affected by a change, rather than re-inspecting the entire part. Whether a full or delta FAI is needed depends on the scope of the change and the customer’s requirements.

Understanding when FAI applies is critical. Teams that skip FAI after a tooling change or supplier switch often discover non-conformances only after producing large quantities of defective parts, at which point the cost of quality is many times higher than the FAI would have been.

The First Article Inspection Process: Step by Step

The FAI process follows a structured sequence from drawing review through production approval. Here is how it works in practice:

1. Review engineering drawings and identify all characteristics. Every dimension, tolerance, surface finish, GD&T callout, and material requirement on the drawing must be identified and listed. Under AS9102, all drawing characteristics must be inspected on the first article, though specific contracts may allow sampling approaches for certain non-critical features depending on agreement with the customer.
2. Create an inspection plan with acceptance criteria. Before any parts are made, the quality engineer defines which measurement method will be used for each characteristic, what the acceptance criteria are, and what inspection equipment is required. This becomes the inspection plan.
3. Produce the first article using production-intent processes. The first article must be made using the same equipment, tooling, raw materials, and process settings that will be used in full production. A part made on different equipment or with prototype tooling does not qualify as a valid first article.
4. Perform dimensional inspection and material verification. Inspection equipment such as CMMs (coordinate measuring machines), calipers, micrometers, and optical comparators are used to measure every critical dimension against the drawing. Material certifications are reviewed, and functional testing is performed where required.
5. Document results in a First Article Inspection Report (FAIR). Every measured value is recorded alongside the nominal dimension and tolerance, creating a complete pass/fail record for each characteristic. Actual measured values must be documented: a simple “pass” checkbox is not sufficient.
6. Review, approve, or initiate corrective action. Results are reviewed by the quality assurance team, engineering, and the customer if required. If all characteristics pass, the FAI is approved and production is authorized. If any characteristic fails, a corrective action process begins before production can proceed.

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First Article Inspection Report (FAIR)

The First Article Inspection Report is the formal output of the FAI process. It documents every characteristic on the engineering drawing with nominal values, tolerances, and actual measured results, creating a traceable record that the part and process meet all requirements.

Under the AS9102 aerospace standard, a complete FAIR typically includes three forms (exact naming may vary by revision in use):

• Form 1 — Part Number Accountability: Identifies the part, drawing number, revision level, and manufacturing source. Confirms that the correct part number and revision are being inspected.
• Form 2 — Product Accountability: Documents raw materials, special processes, and any sub-tier suppliers involved in producing the part.
• Form 3 — Characteristic Accountability: Lists every characteristic on the drawing with the nominal value, tolerance, measurement method, and actual measured result. This is the core of the report.

The FAIR serves multiple purposes beyond initial production approval. It is an audit trail for regulatory compliance, a reference document for future design changes, and evidence of supplier quality for customer and certification audits.

Documenting actual measured values, not just pass/fail outcomes, is essential for traceability and continuous improvement.

FAI Standards: AS9102, PPAP, and ISO 9001

Different industries have formalized FAI under different standards, but the underlying logic is the same across all of them.

AS9102 (Aerospace)

AS9102 is the aerospace standard that defines FAI requirements and report format. It is part of the AS9100 quality management family and is required for virtually all aerospace and defense production contracts.

AS9102 specifies the three-form FAIR structure described above and defines what constitutes an acceptable first article.

PPAP (Automotive)

PPAP (Production Part Approval Process) is the automotive industry’s equivalent process to FAI, used in IATF 16949 environments.

PPAP serves the same fundamental purpose, demonstrating that a production process can consistently produce conforming parts, but is structured around the automotive supply chain’s specific requirements, with defined submission levels and a distinct documentation package. Automotive suppliers work within the PPAP framework rather than a traditional FAI process.

ISO 9001 (General Quality Management)

ISO 9001 quality management systems incorporate FAI principles without mandating a specific format. Organizations certified to ISO 9001 are expected to validate production processes before full-scale manufacturing, which aligns with FAI intent even if the term is not always used explicitly.

Medical Devices (FDA, ISO 13485, EU MDR)

Medical device manufacturers are subject to FDA design controls and process validation requirements in the US, and equivalent frameworks internationally, including EU MDR and ISO 13485, that carry the same intent as FAI: demonstrating that the process produces conforming product before commercial production begins.

Why First Article Inspection Matters

FAI reduces manufacturing risk by catching process errors before the full production run begins. The business case is straightforward: the cost of a failed FAI, stopping production, analyzing the root cause, correcting tooling or process settings, is a fraction of the cost of discovering the same problem after producing thousands of non-conforming parts.

Beyond cost savings, FAI helps manufacturers avoid BOM pitfalls and mistakes that kill product launches by ensuring that the parts being produced actually match the design intent captured in the BOM.

It also supports supplier quality management: requiring contract manufacturers to complete FAI before shipment is one of the most effective incoming quality controls available. And early cost assessment in product development becomes far more reliable when FAI validates that the process can actually produce parts at the specified quality level.

FAI documentation also provides the audit trail that regulated industries require for compliance. For aerospace, automotive, and medical device manufacturers, that documentation is not optional, it is a condition of doing business.

What Happens When FAI Fails?

When a characteristic fails during FAI, production does not proceed. The standard response follows a structured corrective action loop:

1. The non-conformance is documented in the FAIR with the actual measured value and the deviation from specification.
2. Root cause analysis is performed to identify why the characteristic is out of tolerance: tooling wear, process variation, measurement error, or a design issue.
3. Corrective action is implemented: adjusting tooling, updating process parameters, or initiating an engineering change if the specification itself is the problem.
4. A new first article is produced under the corrected conditions.
5. The full FAI is repeated on the new first article before production approval is granted.

A failed FAI is not a failure of the quality system, it is the quality system working as intended. The failure mode to avoid is discovering the same problem after the production run is already complete.

FAI and BOM Data: The Connection

First article inspection depends on accurate, current product data. The inspection is only as reliable as the drawing and BOM it is performed against. If the inspection plan references an outdated revision, or if the BOM lists the wrong raw material, the FAI may pass on paper while the part fails in the field.

Revision control in multi-level BOMs is directly relevant here: every FAI must be tied to a specific drawing revision and BOM revision. When a design change occurs, the FAI must be repeated against the new revision. Without disciplined revision control, there is no reliable way to know which FAI applies to which version of the part.

BOM traceability also supports FAI documentation requirements. The FAIR needs to reference the correct part numbers, raw material certifications, and supplier information, all of which should flow from a well-managed BOM.

The importance of data quality in CAD data imports is another dimension of this: if the data coming out of your CAD environment is inconsistent, the inspection plan built from that data will be unreliable.

OpenBOM connects BOM management, revision control, and part data in a single platform, so the product data your quality team inspects against is always the same data your engineering team released. Explore how OpenBOM supports quality management across your product lifecycle.

Frequently Asked Questions

What is the difference between FAI and routine inspection?

FAI is a one-time, comprehensive verification of the manufacturing process performed before production begins. It covers 100% of all characteristics on the engineering drawing. Routine inspection is ongoing sampling during an active production run and typically covers a statistical sample of parts and characteristics. FAI validates the process; routine inspection monitors it.

How many parts are needed for a first article inspection?

Typically one to three parts from the first production run, produced using production-intent tooling and processes. Some contracts specify exact sample sizes. The critical requirement is that the parts are made under actual production conditions, not with prototype tooling or offline processes, so the FAI reflects what the production process will consistently deliver.

What is AS9102?

AS9102 is the aerospace standard that defines the requirements and reporting format for first article inspection. It is part of the AS9100 quality management family and specifies a three-form FAIR structure covering part number accountability, product accountability, and characteristic accountability. Most aerospace and defense production contracts require AS9102-compliant FAI before production approval.

When does a first article inspection need to be repeated?

FAI must be repeated after design changes, manufacturing process changes, new tooling, a change of supplier, a change of manufacturing location, or production resumption after an extended break, typically defined as two or more years of inactivity. A partial or delta FAI may be acceptable when only specific characteristics are affected by the change, rather than re-inspecting the entire part.

What is included in a First Article Inspection Report?

A FAIR documents every characteristic on the engineering drawing with nominal values, tolerances, and actual measured results. Under AS9102, it includes Form 1 (Part Number Accountability), Form 2 (Product Accountability covering materials and processes), and Form 3 (Characteristic Accountability with measured values for every drawing characteristic). The report serves as both a production approval record and a compliance audit trail.

What industries require first article inspection?

Aerospace (AS9102), automotive (PPAP under IATF 16949), medical devices (FDA process validation requirements), and defense are the primary industries with formal FAI mandates. Many contract manufacturers perform FAI regardless of industry as a standard quality practice, particularly when producing precision parts or entering a new customer relationship.

Conclusion

First article inspection is how manufacturers confirm that their process is ready before committing to full production. It catches tooling problems, process gaps, and specification misunderstandings at the point where they are cheapest to fix, before the production run begins.

For aerospace, automotive, medical device, and defense manufacturers, FAI is not optional. For any manufacturer serious about quality control and risk mitigation, it should not be optional either.

The effectiveness of FAI depends on the quality of the product data behind it: accurate engineering drawings, disciplined revision control, and a BOM that reflects the current design.

When that data is well-managed, FAI becomes a reliable gateway to confident production. When it is not, even a thorough inspection can miss problems caused by outdated specifications or incorrect part references.

REGISTER FOR FREE at OpenBOM to explore how connected BOM management and revision control support streamlined purchasing processes and inspection-ready product data across your manufacturing operations.

By: Jared Haw