AS9102 FAIR on a Bracket: What Aerospace Buyers Verify on the First Article Report

When an aerospace buyer orders 500 CNC-machined brackets, the purchase order almost always includes the requirement for a completed AS9102 First Article Inspection Report before a single production unit ships. The FAIR is the definitive evidence that a supplier’s manufacturing process can consistently produce a part meeting every engineering drawing requirement. Understanding exactly what quality engineers look for on Forms 1, 2, and 3 — from part accountability and material traceability to dimensional verification and special process certifications — can mean the difference between a one-week approval and months of costly rework and re-inspection.

A practical guide to what aerospace buyers verify on an AS9102 FAIR for CNC-machined brackets before releasing production lots.

Why AS9102 FAIR Matters Before Releasing a 500-Piece Bracket Lot

In aerospace procurement, the First Article Inspection Report is far more than a paperwork exercise. It is the formal evidence that a supplier can consistently produce a component that meets every requirement on the engineering drawing. For a CNC-machined bracket destined for an airframe, engine mount, or avionics tray, the FAIR is the critical gate that separates prototype-level confidence from full-scale production authorization.

When a buyer issues a purchase order for 500 brackets, the financial and schedule risk is significant. If dimensional non-conformances surface at incoming inspection after the entire lot is machined, the supplier faces scrap, rework, and potential line-stop charges. The AS9102 standard, maintained by SAE International, exists precisely to prevent that scenario. By requiring the supplier to machine, inspect, and document one or more first articles before production begins, the buyer gains objective proof that the manufacturing process is capable.

The standard defines three forms that together create a complete picture. Form 1 captures part accountability: what was made, from what revision, and by whom. Form 2 captures product accountability: what materials and processes were used. Form 3 captures characteristic accountability: how every dimension and requirement measured against nominal. Aerospace buyers and their quality engineers review each form with a specific checklist in mind. Knowing that checklist in advance allows experienced CNC machining suppliers like FRIMA, with over 12 years of precision manufacturing experience, to prepare FAIR packages that pass buyer review on the very first submission.

Form 1: Part Accountability and Drawing Traceability

Form 1 is the cover sheet of the AS9102 FAIR, and buyers review it first. It establishes the identity of the inspected part and ties it to a specific engineering drawing revision. For an aerospace bracket, the buyer will verify that the part number, part name, and drawing revision level on Form 1 exactly match the revision current at the time the purchase order was released. A common rejection occurs when a supplier uses an older drawing revision and the FAIR references a superseded revision number. Even if the geometry is identical, the mismatch raises a red flag because the buyer cannot confirm that all revision changes were incorporated.

Buyers also check the serial number or lot number assigned to the first article part. AS9102 requires that the inspected part be uniquely identified so that it can be recalled if questions arise later. For brackets, this typically means a stamped or engraved serial number on a non-critical surface, as specified by the drawing. The form must also list the manufacturing process flow: which CNC machine was used, what fixture or workholding was employed, and whether any manual deburring or hand-finishing steps were performed. This documentation assures the buyer the same process will be repeated for all remaining units.

Another key item on Form 1 is the supplier's quality management system registration. Buyers expect to see ISO 9001 certification at a minimum, and many aerospace primes require AS9100. FRIMA holds both ISO 9001 and IATF 16949 certifications, which demonstrates a mature quality infrastructure. The form also captures the inspector name and the inspection date. If the buyer's quality engineer sees that the inspection was performed by a certified CMM operator on a calibrated coordinate measuring machine, confidence in the results increases immediately.

Form 2: Product Accountability for Materials and Special Processes

Form 2 is where buyers verify that every material and special process used on the bracket is properly documented and approved. For a typical aerospace aluminum bracket machined from 6061-T6 or 7075-T6 plate, the buyer will require a material certificate (mill certification) that traces the raw stock to a specific heat number, lot number, and supplier. The certificate must show that the material meets the applicable specification, such as AMS-QQ-A-200/8 for 6061-T6 extrusions or AMS 4045 for 7075-T6 sheet and plate. Chemical composition and mechanical properties must fall within specification limits.

The buyer cross-references the heat and lot numbers on the material certificate against the traceability information on Form 1. If the FAIR states that the bracket was machined from heat number ABC123, but the attached mill cert references heat number XYZ789, the entire Form 2 package is rejected. This traceability link is non-negotiable in aerospace quality because it enables root-cause analysis if a field failure ever occurs.

Special processes documented on Form 2 include any surface treatment, coating, heat treatment, or chemical processing applied to the bracket. Common special processes for aerospace brackets include sulfuric acid anodizing per MIL-A-8625 Type II, hard anodizing per Type III, chromate conversion coating per MIL-DTL-5541, and passivation per AMS 2700. For each special process, the buyer verifies that the process was performed by a Nadcap-accredited supplier and that a process certification accompanies the FAIR. The Nadcap accreditation status can be confirmed through the eAuditNet database maintained by the Performance Review Institute (PRI). Buyers will reject a FAIR if a special process supplier cannot be verified as Nadcap-accredited for the applicable process type.

Form 3: Characteristic Accountability and Dimensional Verification

Form 3 is the most data-intensive part of the AS9102 FAIR, and it is where aerospace buyers spend the most review time. Every dimension, tolerance, geometric callout, surface finish requirement, and note on the engineering drawing that defines the bracket's form, fit, or function must be listed on Form 3 with its nominal value, tolerance range, measured value, and pass/fail determination. For a typical aerospace bracket with 40 to 80 critical dimensions, this means 40 to 80 rows of measurement data.

Buyers verify that the Form 3 entries cover every characteristic on the current drawing revision. A common mistake is omitting dimensions in drawing notes rather than on graphic views. For example, a note stating "ALL EDGES SHALL HAVE A 0.010-0.020 INCH BREAK" is a measurable characteristic that must appear on Form 3. Similarly, general tolerances in the title block apply to every dimension without an explicit tolerance, and the buyer expects those implied tolerances to be verified.

Geometric dimensioning and tolerancing (GD&T) callouts receive particular attention. For a bracket with a flatness callout of 0.005 inches on a mounting surface, the buyer expects to see a measured flatness value on Form 3 from a CMM scan. Position tolerances on bolt hole patterns are checked by computing actual hole positions from CMM data and comparing them to the true position tolerance zone. Surface finish requirements, specified as Ra values in microinches or micrometers, must also appear with measured values from a profilometer. The NIST calibration services framework provides the metrological traceability chain that underpins these measurements. FRIMA' CNC milling capabilities, backed by calibrated inspection equipment, ensure that every characteristic on Form 3 is measured and documented with the precision that aerospace buyers demand.

Dimensional Verification: CMM Data, Ballooned Drawings, and Measurement Uncertainty

Aerospace buyers expect the FAIR package to include more than just the completed Form 3 spreadsheet. Best practice, and often a contractual requirement, is to include a ballooned drawing that numbers every characteristic inspected, cross-referencing each balloon number to the corresponding row on Form 3. This visual mapping allows the buyer's quality engineer to quickly locate any dimension on the drawing and find its measured result. Without a ballooned drawing, the reviewer must manually correlate dimensions, which increases the chance that an error goes undetected.

CMM data reports are another expected attachment. Buyers want to see the raw coordinate measuring machine output, not just the final measured values. This is because CMM data allows the buyer to verify that the correct measurement strategy was used. For example, a bolt hole pattern with a true position tolerance should be measured by probing the actual hole surfaces and computing the center points, not by using a simple caliper measurement of hole-to-hole distance. The CMM report should also reference the calibration status of the machine, including the calibration certificate number and the due date for the next calibration.

Measurement uncertainty is a concept that aerospace buyers increasingly require in FAIR packages, particularly for tight-tolerance features. If a bracket bore has a diameter tolerance of +/- 0.0005 inches, the CMM used to measure it must have a measurement uncertainty significantly smaller than the tolerance band. The general rule is that measurement uncertainty should be no more than one-quarter of the tolerance for critical features. Buyers will scrutinize the CMM calibration certificate to confirm that the machine's accuracy specification supports the tolerances being reported on Form 3.

Material Certifications: Mill Certs, Chemical Composition, and Mechanical Properties

Material traceability is one of the most scrutinized elements of an aerospace FAIR. For a CNC-machined aluminum bracket, the buyer expects to receive a copy of the raw material mill certification that includes the chemical composition analysis and mechanical property test results. The chemical composition must conform to the applicable material specification, and each element must fall within the specified range. For 7075-T6 aluminum, for instance, the zinc content must be between 5.1% and 6.1%, magnesium between 2.1% and 2.9%, and copper between 1.2% and 2.0%.

Mechanical properties listed on the mill cert typically include ultimate tensile strength, yield strength, and elongation. For 7075-T6, the minimum ultimate tensile strength is 76 ksi, the minimum yield strength is 68 ksi, and the minimum elongation is 7%. Buyers verify that these values meet or exceed the specification and that the test method referenced on the cert is an ASTM standard such as ASTM E8 for tensile testing. The mill cert must also identify the material supplier, the heat number, the lot number, and the product form (plate, sheet, bar, or extrusion).

Beyond the mill cert, some buyers require additional material documentation such as a Certificate of Conformance (CoC) or a Certificate of Analysis (CoA) from the material distributor. For flight-critical brackets, the buyer may even require that the material be sourced from a qualified producer listed on the manufacturer's approved supplier list. FRIMA maintains full material traceability from incoming raw stock through finished part shipment, ensuring that every bracket delivered is backed by complete and auditable material documentation.

Special Processes: Anodizing, Surface Treatments, and Nadcap Requirements

Aerospace brackets rarely leave the CNC machine in a bare-machined condition. Most require at least one special process, such as anodizing, chemical conversion coating, passivation, or heat treatment. Each of these processes must be documented on Form 2 of the AS9102 FAIR with a process certification from the performing supplier. Buyers verify several specific elements on each process certification.

First, the process specification and type must match what is called out on the engineering drawing. If the drawing specifies sulfuric acid anodizing per MIL-A-8625 Type II, Class 1 (undyed), the process cert must reference exactly that specification and type. A cert referencing Type III (hard anodize) instead of Type II would be a non-conformance, even if the coating thickness happens to fall within the Type II range. Second, the process cert must include measurable results such as coating thickness, seal quality, and salt spray test results where applicable. Buyers expect coating thickness to be measured at specified locations on the bracket, not just on a witness coupon.

Third, and critically, the special process supplier must hold Nadcap accreditation for the specific process performed. Nadcap (National Aerospace and Defense Contractors Accreditation Program) is the industry-recognized accreditation system for special processes in aerospace manufacturing. The Performance Review Institute (PRI) administers Nadcap audits, and accreditation status is publicly searchable. A buyer reviewing a FAIR will confirm that the anodize shop listed on the process cert shows current Nadcap accreditation for chemical processing. If the accreditation has expired or does not cover the specific process, the FAIR is rejected regardless of how good the physical results are. Suppliers pursuing Nadcap accreditation for their own facilities can reference the SAE AS9102 standard documentation alongside Nadcap requirements to build a compliant quality system.

Common FAIR Rejection Reasons and How to Avoid Them

Understanding why FAIRs get rejected is just as important as understanding what buyers verify. Based on common aerospace buyer feedback, the top rejection reasons for bracket FAIRs fall into several categories. The first is drawing revision mismatch: the FAIR references revision B, but the purchase order was issued against revision C. This is an avoidable error that requires the supplier to confirm the correct revision before beginning the first article. A simple best practice is to include a copy of the purchase order in the FAIR package so the reviewer can verify the revision link.

The second common rejection is incomplete Form 3 coverage. If the engineering drawing contains 65 measurable characteristics but Form 3 only lists 58, the buyer will issue a finding requiring the supplier to measure and report the missing seven. This often happens with general notes, surface finish callouts on hidden features, or geometric tolerances that the operator overlooked. Using a systematic ballooning process, where every characteristic is numbered on the drawing before any measurement begins, eliminates this gap.

The third category is traceability failures on Form 2. Missing mill certs, mismatched heat numbers, or special process certifications from non-Nadcap suppliers are all grounds for rejection. The best defense is a pre-submission checklist that verifies every material and process attachment is present and traceable before the FAIR package is sent to the buyer. FRIMA follows a rigorous internal FAIR preparation workflow that addresses each of these common pitfalls, resulting in a high first-submission acceptance rate for aerospace bracket orders.

How FRIMA Supports Aerospace Buyers Through the FAIR Process

With over 12 years of experience in precision CNC machining, FRIMA has supported aerospace, automotive, and industrial customers through hundreds of first article inspections. Approximately 70% of FRIMA' production involves aluminum alloys, the most common material family for aerospace brackets. The company's CNC milling and CNC turning capabilities, combined with in-house CMM inspection, enable end-to-end control of the FAIR process from raw material receipt through final dimensional verification.

FRIMA' quality system, certified to both ISO 9001 and IATF 16949, provides the documented procedures, calibration records, and training documentation that aerospace buyers expect to see as supporting evidence in a FAIR package. The company's experience with CNC milling parts in aluminum, steel, and brass means that the manufacturing process documentation required by Form 1 is always complete and accurate. For customers requiring precision machined components with tight GD&T requirements, FRIMA' engineering team reviews the drawing before quoting to identify every characteristic that will appear on Form 3.

Aerospace buyers evaluating new suppliers for bracket programs should consider not just the quoted unit price but the supplier's demonstrated ability to deliver a clean FAIR on the first submission. A rejected FAIR can delay production release by weeks, and the cost of that delay almost always exceeds any savings from a lower unit price. FRIMA' track record of accurate, complete FAIR packages gives buyers confidence that production lots will be released on schedule. For questions about FRIMA' FAIR capabilities or to request a quote for CNC-machined aerospace brackets, visit the FRIMA contact page.