What Is AS9102 First Article Inspection?
Also known as: FAI, First Article Inspection Report, FAIR
Definition
AS9102 First Article Inspection is the aerospace requirement to verify that a production process reliably produces conforming parts by fully inspecting and documenting a representative first article against every drawing and specification characteristic.
AS9102 First Article Inspection Explained
An FAI answers a process question, not a part question. Inspecting one unit exhaustively proves that the combination of drawing interpretation, tooling, program, material, operator instructions, and inspection method actually yields a conforming part. If the first article conforms, the process is validated and subsequent production can rely on sampling and in-process controls. If it does not, the failure is caught before a production lot is scrapped or, worse, before nonconforming hardware reaches an assembly line.
AS9102 standardizes the documentation across three forms. Form 1 handles part number accountability: part number, revision, drawing number, serial or lot identification, supplier, whether the FAI is full or partial, and the assembly structure for detail parts rolling into an assembly. Form 2 covers product accountability: raw material certifications, special process certifications and the approvals behind them, and functional or acceptance test results. Form 3 is characteristic accountability, listing every characteristic on the drawing with its requirement, the actual measured result, the inspection method used, and any nonconformance.
The mechanical starting point is the ballooned drawing. Every dimension, tolerance, note, finish callout, and specification reference is assigned a sequential balloon number, and each balloon becomes a row on Form 3. A moderately complex machined housing can carry 200 to 400 characteristics. Missing characteristics - typically drawing notes, general tolerances applied to unspecified dimensions, or requirements buried in referenced specifications - are the single most common cause of FAI rejection by a customer quality organization.
A new or partial FAI is required by defined triggers, not by calendar. These include the first production run of a part, a change to the design affecting fit, form, or function, a change in manufacturing source, process, inspection method, tooling, or location, a natural or man-made event affecting the process, and a lapse in production commonly treated as two years. A partial FAI addresses only the characteristics affected by the change and must reference the prior full FAI, which is why the original documentation must remain retrievable for the life of the program.
Revision C, published in the mid 2010s, was the long-standing baseline; Revision D followed in 2022 and modernized the standard with structured digital data exchange, clarified sampling and partial FAI handling, and better alignment with model-based definition where the authority is a 3D model rather than a 2D drawing. Contracts specify which revision applies, and a customer operating to Rev C will reject a package formatted only to Rev D conventions, so the applicable revision belongs in the quality plan for each program.
Why It Matters
- A rejected FAI package delays first shipment and revenue recognition, often by weeks, even when the hardware itself is fully conforming.
- The trigger list means routine events - moving a machine, changing a plating vendor, a production gap - silently create a new FAI obligation.
- Characteristic accountability forces complete drawing interpretation, catching missed notes and specification callouts before production scale-up.
- FAI records are a standing audit target under AS9100 and must remain retrievable and linked to serialized production for the program life.
In Practice
The classic gotcha is the special process certificate. A supplier submits a complete Form 3 with every dimension in tolerance and the package is rejected because the anodize vendor listed on Form 2 was not on the customer approved-processor list for that specification revision. Verify processor approval status against the customer's current list before the parts are processed, not when assembling the FAI package, because reprocessing a finished lot usually means scrapping it.
Frequently Asked Questions
When is a partial FAI acceptable instead of a full FAI?
A partial FAI is used when a change affects only some characteristics of a part that already has a valid full FAI on record. Examples include a tooling change affecting three dimensions or a new plating supplier affecting a finish callout. The partial package documents only the affected characteristics and must reference the original full FAI, which must remain available.
Who performs the AS9102 first article inspection?
The supplier producing the part performs and documents the FAI using its own qualified inspection resources and calibrated equipment. The customer reviews and approves the resulting First Article Inspection Report. Some programs require customer source inspection or an on-site witness, and higher-risk parts may require an independent third-party laboratory for specific measurements or material verification.
Related Terms
AS9100
AS9100 is the quality management system standard for the aviation, space, and defense industry, published by SAE and the International Aerospace Quality Group, which incorporates all of ISO 9001 and adds sector-specific requirements for safety, configuration, and risk.
ISO 9001
ISO 9001 is the international standard specifying requirements for a quality management system, enabling an organization to consistently provide products and services that meet customer and regulatory requirements and to improve through a process-based, risk-aware approach.
AS5553 (Counterfeit Parts)
AS5553 is the SAE standard defining requirements for avoiding, detecting, mitigating, and disposing of counterfeit electrical, electronic, and electromechanical parts, used by aerospace and defense organizations to build a documented counterfeit parts control plan.
Go Deeper
AS9100 Audit Readiness Checklist
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Lot Traceability in Electronics Manufacturing
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