What is the purpose of AS9102 Form 3?

AS9102 Form 3 is used to document characteristic accountability and verification results for a First Article Inspection. In practical terms, it is where each drawing, model, or specification requirement is listed, tied to a balloon or characteristic number, and matched to the actual inspection result or verification evidence.

The purpose is not just to record dimensions. Form 3 is intended to show that the organization has identified the applicable design characteristics and has objective evidence that each one was evaluated during the FAI. That can include dimensional measurements, notes, material-related characteristics, process-related characteristics, and other requirements called out by the engineering definition.

What Form 3 normally contains

Form 3 commonly includes the characteristic number, drawing or model zone, design requirement, inspection result, and any related notes or nonconformance references. The exact implementation can vary by AS9102 revision, customer flow-down, supplier portal, or internal procedure.

In many companies, Form 3 is tied directly to a ballooned drawing or annotated model. If the ballooning is incomplete, inconsistent, or based on the wrong revision, the Form 3 record will be weak even if the form itself is filled out neatly.

What Form 3 does not do by itself

Form 3 does not prove that a production process is stable, capable, or compliant over time. It records the first article verification for the defined part, revision, and production conditions. Ongoing control still depends on the approved process, inspection plan, operator instructions, special process controls, nonconformance handling, and change control.

It also does not remove the need for judgment. Some characteristics are straightforward measurements. Others require interpretation of notes, geometric tolerancing, specification callouts, tooling conditions, or customer-specific requirements. Those decisions should be controlled and traceable, not left to informal shop-floor convention.

Where errors usually occur

• Missed characteristics: Notes, embedded specifications, model-based definition requirements, and reference dimensions can be mishandled if the ballooning process is weak.
• Wrong revision basis: Form 3 must align with the correct drawing, model, specification, and part revision. PLM, ERP, MES, and supplier portals do not always stay synchronized without disciplined controls.
• Unclear evidence: Results should be traceable to inspection records, CMM reports, gage data, certificates, or other accepted evidence. A value entered without source context may not be enough for review.
• Nonconformance handling gaps: If a characteristic does not meet the requirement, the FAI package should reference the applicable nonconformance or disposition process. Form 3 should not be used to hide or normalize an out-of-tolerance condition.

How it fits with digital systems

In brownfield aerospace environments, Form 3 data may come from several systems: PLM for engineering definition, MES or digital travelers for routing context, QMS for nonconformances, CMM software for measurements, and ERP for part and revision information. The risk is not usually the absence of a form; it is inconsistent data between systems.

Full system replacement is often unrealistic in regulated manufacturing because of validation cost, qualification burden, downtime risk, integration complexity, and long equipment lifecycles. A more practical approach is usually controlled integration, clear ownership of master data, validated templates, and audit trails for changes to characteristics and results.

Used well, AS9102 Form 3 provides a traceable record that the design characteristics for the first article were identified and verified. Used poorly, it becomes a clerical artifact that looks complete but does not reliably support FAI review, customer submission, or internal quality decisions.