KEY TAKEAWAYS

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AS9102 defines the minimum documentation and physical verification requirements for First Article Inspection in aerospace and defense supply chains.

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FAI is required on new part numbers, after design changes, after manufacturing process changes, and after a lapse in production exceeding two years.

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A compliant FAI package includes three forms: Part Number Accountability (Form 1), Product Design Documentation (Form 2), and Characteristic Accountability (Form 3).

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Balloon drawings are a critical FAI deliverable — every inspected dimension must be cross-referenced to the inspection data sheet.

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An incomplete or undocumented FAI is a major nonconformance under AS9100 and can trigger a supplier corrective action request (SCAR).

AS9102 is an aerospace standard published by SAE International that defines the requirements for First Article Inspection (FAI) of manufactured parts and assemblies. It is formally titled AS9102B: Aerospace First Article Inspection Requirement and is the governing document for FAI across the aerospace, defense, and space industries. The standard exists because design intent on paper — tolerances, materials, finishes, processes — does not automatically translate into a conforming physical part. FAI is the structured verification that bridges that gap before a supplier is authorized for production.

The standard was developed in response to persistent quality escapes in aerospace supply chains where parts passed incoming inspection but failed in service because critical characteristics were never systematically verified on the first production article. AS9102 creates a common language between OEMs, Tier 1s, and their suppliers so that ‘we did a first article’ actually means something verifiable and auditable. It is referenced directly in AS9100 Rev D clause 8.1.3, which means any AS9100-certified organization must have a process for FAI that aligns with its requirements. For procurement professionals, requiring AS9102-compliant FAI packages from your supply chain is not bureaucratic overhead — it is one of the most cost-effective risk controls available.

AS9102 is not just a quality department form — it is contractually binding when called out in a purchase order or engineering drawing. Verify it is explicitly required in your supplier flowdown.

FAI is not a one-time event. AS9102B defines five triggering conditions that require a new or partial FAI regardless of supplier history or prior qualification. Understanding these triggers is essential for both design engineers managing ECOs and procurement teams managing supplier change notifications.

The five primary FAI trigger conditions are:

• New part number — any part entering production for the first time.
• Design change — any revision to the engineering drawing or model that affects form, fit, or function.
• Manufacturing process change — a change to tooling, equipment, facility, or process sequence that could affect part characteristics.
• Production lapse — parts not produced for two or more years require a new FAI to verify process capability has not degraded.
• Natural disaster or facility move — any event that could disrupt the established manufacturing environment.

A common procurement mistake is assuming a previously qualified supplier does not need a new FAI after a quiet engineering change order. Even a tolerance tightening on a single dimension constitutes a design change and requires at minimum a partial FAI covering the affected characteristics. Always include FAI requirements explicitly in your purchase order terms.

Partial FAI is allowed under AS9102B. If only specific characteristics were affected by a change, you may scope the FAI to those features — but all three forms must still be updated and re-signed.

AS9102B structures the FAI package around three standardized forms. Each form addresses a different layer of verification — from documentation accountability to physical measurement results. Together, they create a complete, auditable record of conformance.

Form 1 — Part Number Accountability: This form documents the top-level part being inspected, all sub-assemblies, and every raw material and purchased part that goes into it. Material certifications (certs of conformance, material test reports) are attached here. The goal is to prove that every input into the part is documented and traceable.

Form 2 — Product Design Documentation: Form 2 accounts for every design document that governs the part — the drawing revision level, any applicable specifications (AMS, MIL-SPEC, ASTM), process specifications, and surface finish requirements. This form confirms the supplier is working from the correct, current revision of all applicable documentation. A common audit finding is Form 2 referencing an obsolete drawing revision.

Form 3 — Characteristic Accountability: This is the measurement data form. Every characteristic called out on the drawing — dimensions, tolerances, GD&T callouts, surface finish values — is listed, measured on the first article, and compared to the engineering requirement. Actual measured values must be recorded. Pass/fail stamps alone are not acceptable under AS9102B. This form is where balloon numbers from the drawing directly map to inspection results.

Never accept a Form 3 that only shows pass/fail checkmarks. AS9102B requires actual measured values. If your supplier cannot provide them, that is a nonconformance.

One of the most practical — and most frequently botched — elements of an AS9102-compliant FAI is the balloon drawing. A balloon drawing is a marked-up version of the engineering drawing where every inspectable characteristic is circled (ballooned) and assigned a sequential reference number. That number maps directly to a row in Form 3, creating an unambiguous link between the drawing callout and the inspection result.

Proper ballooning requires identifying all of the following: linear dimensions with tolerances, geometric dimensioning and tolerancing (GD&T) feature control frames, surface finish callouts, material callouts, weld symbols, coating or treatment requirements, and any notes with inspectable content. This is more than just dimensioned geometry — a drawing note that says ‘all edges break 0.005 inch to 0.015 inch’ is a characteristic and must be ballooned and measured. Many FAI packages fail audits because notes and specifications in the title block were overlooked during characteristic identification.

For complex machined parts, balloon drawings can easily exceed 100 characteristics. This is normal. The investment in thorough ballooning at the first article stage prevents measurement ambiguity during production inspection and makes re-inspection after changes significantly faster. At Nimble’s certified partner network, CMM inspection data is provided with FAI packages — actual point measurements tied directly to ballooned characteristics, not manual caliper spot-checks.

If your drawing has general tolerance notes (e.g., .XXX = plus/minus 0.005 inch), every dimension governed by that note is an inspectable characteristic and must appear on the balloon drawing and Form 3.

A complete FAI package is not just measurement data — it is a full documentation package that traces every input to an authoritative source. Material and process certifications are among the most scrutinized elements during a supplier audit or customer source inspection, and deficiencies here are among the most common FAI findings in aerospace supply chains.

Raw material certifications must meet the drawing callout exactly. If the drawing specifies AMS 2750 pyrometry, the heat treat supplier must provide a cert referencing that specification at the correct class and type — not a generic statement of compliance. If the drawing calls for aluminum 6061-T6 per AMS 2770, the material test report must show the actual chemistry and mechanical properties from the mill heat, not just a downstream distributor cert. Traceability to a specific heat or lot number is required.

Special processes — anodizing, plating, chemical conversion coating, heat treatment, NDT — each require their own conformance documentation. Nadcap accreditation of the process supplier is often a customer flowdown requirement for aerospace programs and must be verified and attached. Process specifications (AMS, MIL-SPEC, or customer-proprietary specs) must be listed on Form 2 and supported by supplier certs on Form 1. A missing Nadcap cert for a special process is a hard stop for many prime contractors.

Distributor certificates of conformance alone are not acceptable for most aerospace programs. Require mill certifications with actual chemistry and mechanical test data traceable to the specific heat or lot number.

FAI rejections are expensive. They delay production authorization, consume engineering and quality engineering time, and can damage supplier scorecard ratings. Understanding the most common failure modes allows teams to build processes that prevent them upstream rather than discovering them during a customer review.

The most frequent FAI deficiencies observed in aerospace supply chains include:

• Incomplete characteristic capture — drawing notes and specifications not ballooned or measured.
• Missing or non-conforming material certs — distributor certs substituted for mill certs, or certs referencing wrong specification revisions.
• Obsolete drawing revision on Form 2 — supplier working from a superseded rev without documented deviation or waiver.
• Pass/fail only on Form 3 — actual measured values not recorded.
• Unsigned or undated forms — forms without authorized signatures are not legally valid records under AS9100.
• Special process certs missing or expired — Nadcap certs lapse and must be current at time of FAI.

The most effective prevention is a formal FAI checklist reviewed during the pre-production kickoff, not at final inspection. Assign ownership of each form to a specific individual and set an internal review gate before submitting to the customer. Treat the FAI package as a deliverable with the same rigor as the hardware itself.

Build your FAI checklist from the drawing, not from memory. Read every note, every specification callout, and every process requirement on the drawing systematically — then verify each one has a corresponding entry in the package.

AS9102 does not stand alone — it exists within the broader AS9100 quality management system framework and is directly referenced in AS9100 Rev D. Organizations certified to AS9100 are audited for compliance with their FAI processes, which must be documented in their QMS procedures and demonstrably aligned with AS9102 requirements. For suppliers, this means FAI is not just a customer deliverable — it is an internal quality process that an AS9100 registrar will examine during surveillance audits.

The term FAIR (First Article Inspection Report) is used interchangeably with FAI package in most industry communication. The FAIR is the complete compiled package: all three forms, the balloon drawing, all material certs, all process certs, all NDT records, and any deviations or waivers. Some customers require the FAIR to be submitted in a specific format or through a quality management portal. Always confirm customer-specific requirements during contract review — they may supplement AS9102 with additional requirements.

For teams sourcing through a managed partner network like Nimble, AS9100 certification of the manufacturing partners is a baseline requirement. This means the FAI process is already embedded in the supplier’s QMS — you are not building it from scratch with each new source. Quotes from Nimble’s certified partner network include CMM inspection as standard, which directly supports Form 3 data quality and reduces the rework cycle on FAI package submissions.

AS9100 Rev D clause 8.1.3 requires organizations to have a process for first article inspection. If your QMS procedure references AS9102, your actual practice must conform to AS9102 — auditors will verify both.

FAI planning should begin at design release, not at purchase order issuance. The earlier FAI requirements are established in the procurement flow, the less friction there is during production authorization. There are several structural practices that consistently improve FAI outcomes across aerospace programs.

First, include FAI requirements explicitly in the purchase order. Reference AS9102B by name and revision, define which forms are required, specify the balloon drawing requirement, and list any customer-specific supplements or portal submission requirements. Ambiguity in purchase order terms is the root cause of most supplier disputes over FAI scope. Second, conduct a pre-production kickoff with the manufacturing supplier that covers the FAI plan — who is responsible for each form, what inspection equipment will be used, and what the submission timeline is relative to part delivery. Third, review FAI packages before hardware ships. An FAI package submitted alongside hardware leaves no time to address deficiencies without schedule impact.

For prototype and low-volume production runs where full AS9102 compliance may not be contractually required, it is still good engineering practice to document key characteristics and material traceability. This creates a baseline that makes future FAI requirements significantly easier to fulfill when the program scales to production volumes. The investment in documentation discipline early pays compounding returns as the program matures.

Do not wait for the customer to request the FAI package. Submit it proactively before or concurrent with hardware delivery. A complete package in hand before inspection reduces hold time and demonstrates supplier maturity.

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