AS9102 FAI Rejection Reasons: 12 Mistakes That Get Your Report Sent Back

Q: What is the most common reason AS9102 FAI reports get rejected?

Missing or unballooned characteristics on Form 3 , accounting for approximately 38% of first-time FAIR rejections. Every design characteristic on the drawing — dimensions, tolerances, GD&T callouts, surface finishes, notes, flag notes — must be uniquely ballooned and listed on Form 3 with actual measurement results. A single missed note is sufficient for rejection.

Q: Do I need a ballooned drawing as part of my FAI submission?

Yes, in practice. AS9102 Section 5.2 states: “Verify that every design characteristic requirement is accounted for, uniquely identified and has inspection results traceable to each unique identifier.” While the standard does not explicitly mandate a physical ballooned drawing, most aerospace customers interpret “uniquely identified” to require a ballooned document (drawing, 3D model, or purchase order) as part of the FAIR package. Check your customer’s specific quality requirements (e.g., Boeing BAC, Airbus AIPS, or Pratt & Whitney ASQR-01) for explicit ballooned drawing requirements.

Q: What Cpk value is required for Key Characteristics on AS9102 Form 3?

C pk ≥ 1.33 based on a minimum sample of 30 consecutive production pieces. If the process cannot demonstrate C pk ≥ 1.33, AS9102 requires 100% inspection of the Key Characteristic with documented results. A single measurement on one part is not acceptable evidence for a KC. Per AS9103, KCs are identified on the drawing with a triangle symbol and must be explicitly flagged on Form 3.

Q: Can I submit an AS9102 FAI if a material cert is missing one piece of data?

No. Form 2 requires complete material certification for every material on the drawing BOM: chemical composition, mechanical properties, heat/lot number, and supplier identification. A cert missing any required data element renders the FAI incomplete. Obtain the complete cert from the material supplier before submitting. If the original cert cannot be obtained, the material must be re-tested by an accredited laboratory.

Q: How do I verify my special process supplier’s Nadcap accreditation is current?

Search the PRI eAuditNet database (the official Nadcap accreditation registry managed by Performance Review Institute). Verify: (1) the supplier is listed, (2) the accreditation scope covers the specific process you need (e.g., heat treatment per AMS 2770, NDT per AC7114, chemical processing), and (3) the accreditation has not expired. Even a one-day lapse invalidates the FAIR for that process. Check before every FAI submission, not just at initial qualification.

Q: When does a process change require a new FAI per AS9102?

AS9102 Section 4.6 defines these triggers for partial or full re-FAI: (1) design characteristic change affecting form, fit, or function; (2) change in manufacturing location; (3) change in process (including CNC program changes that affect characteristics); (4) change in tooling; (5) change in material source; (6) change in inspection method; (7) production break of more than 2 years; (8) completion of corrective action from a prior FAI. When in doubt, assess the change against the standard and notify the customer before proceeding.

Q: What happens if a dimension measures out of tolerance during FAI?

Record the actual measurement honestly on Form 3, then immediately open a Non-Conformance Report (NCR) . The NCR must have a formal disposition before the FAIR can be submitted: use-as-is (with customer engineering approval), rework to conform, or scrap. You cannot submit an FAIR with an out-of-spec result and no disposition attached — this is one of the 12 most common rejection reasons.

You submitted your AS9102 First Article Inspection report and it came back rejected — again. You are not alone. Analysis of FAIR rejection data from aerospace Tier 1 and Tier 2 suppliers shows the same 12 mistakes surface repeatedly, and most are preventable with a structured pre-submission review. This page breaks down each rejection reason, explains why it happens, and tells you exactly how to fix it before your next submission.

Why Your AS9102 FAI Report Keeps Getting Rejected

A common scenario in aerospace supply: a CNC machine shop delivers a perfect first article part — every dimension in spec, every surface finish correct — but the FAI report is rejected on paperwork alone. The part is fine. The documentation is not.

AS9102 (currently Revision C, published 2023) is the international aerospace standard for First Article Inspection, co-published as AS9102 (SAE, Americas), EN 9102 (AECMA, Europe), and SJAC 9102 (Asia). It defines three forms — Form 1 (Part Number Accountability), Form 2 (Product Accountability), and Form 3 (Characteristic Accountability) — that together must account for every single design characteristic on the drawing, with traceable evidence.

Mistake 1 — Missing or Unballooned Characteristics on Form 3

The single most common rejection cause. Form 3 is submitted without a ballooned drawing, or not all drawing callouts are numbered and captured on the form. AS9102 Section 5.2 requires: “Verify that every design characteristic requirement is accounted for, uniquely identified and has inspection results traceable to each unique identifier.”

Rejection rate for this issue alone: approximately 38% of first-time FAIR submissions. Common variants:

Inspector annotates the original drawing instead of creating a clean balloon set
General notes, flag notes, or title block requirements are skipped (AS9102 requires every note to be verified)
Surface finish symbols, GD&T callouts, or weld symbols are not ballooned
Sub-tier assembly characteristics are missing from the balloon index

Fix. Create a dedicated ballooned drawing (or use auto-balloon software). Number every dimension, tolerance, GD&T frame, surface finish symbol, note, and flag note. Transfer each balloon number to Form 3 in sequential order. Cross-check the balloon count against the total characteristic count before submission.

Mistake 2 — Drawing Revision Mismatch

The FAIR is prepared against Rev C of a drawing, but the customer’s current released revision is Rev D. All measurement data is against the wrong baseline — full resubmission required. This happens when:

The drawing was revised during production and the inspection team was not notified
The supplier is working from an emailed PDF that has since been superseded
A 3D CAD model was updated but the 2D drawing was not re-issued

Fix. Before starting any FAI, confirm the latest released drawing revision directly from the customer’s engineering data system (not from email attachments). Record the revision level on Form 1, field 2b. If a revision change occurs mid-FAI, stop and re-plan against the new revision.

Mistake 3 — Material Certification Gaps on Form 2

Form 2 lists a material specification, but the attached Certificate of Conformance (CoC) does not include full chemical and mechanical test results, or the lot/heat number on the CoC does not match the material used for the first article part.

AS9102 Form 2 requires: raw material specification, supplier name, heat/lot number, and certification that the material meets the specified chemical and mechanical requirements. Every material on the drawing bill of materials must have a corresponding entry with certification attached.

Fix. Before starting the FAI, collect material certs for all drawing-called materials. Verify: (1) chemical composition matches the spec (e.g., AMS 4027 for 7075-T6), (2) mechanical properties (UTS, yield, elongation) meet minimums, (3) heat/lot number on the cert matches the physical material used for the first article. Maintain a material traceability log from receipt through production.

Mistake 4 — Expired Nadcap or Special Process Accreditation

The special process certifications attached to Form 2 reference a processor whose Nadcap scope has lapsed. Even a one-day expiration invalidates the FAIR for that process.

Special processes include heat treatment, non-destructive testing (NDT), surface treatment (anodize, plating, passivation), welding, and chemical processing. Each must be performed by a Nadcap-accredited facility (or customer-approved equivalent) with a current, in-scope accreditation.

Fix. Before submission, verify every special process supplier’s Nadcap accreditation status on the PRI eAuditNet database. Confirm the scope covers the specific process (e.g., heat treatment to AMS 2770, NDT per AC7114). Check expiration dates. If any accreditation has lapsed, re-do the special process with an accredited supplier and update Form 2.

Mistake 5 — No Statistical Evidence for Key Characteristics

Key Characteristics (KCs) are listed on Form 3 with a single measurement value. AS9102 requires a process capability study — minimum 30 samples, C_pk ≥ 1.33 — for each identified Key Characteristic. A single measurement is not evidence of process capability.

KCs are identified on the drawing with a triangle symbol (per AS9103). They are characteristics whose variation “significantly affects product fit, performance, service life, or manufacturability.” Per AS9102, each KC on Form 3 must be explicitly called out with statistical evidence.

KC Requirement	AS9102 Expectation	Common Mistake
Process capability	C_pk ≥ 1.33, minimum 30 samples	Single measurement recorded
Identification	Triangle symbol on drawing, flagged on Form 3	KC not identified on Form 3
100% inspection alternative	If C_pk cannot be demonstrated, 100% inspection of the KC	Neither C_pk nor 100% inspection performed
Record retention	Statistical data retained with FAI package	Data not attached or not traceable

Fix. For each KC: (1) Run a minimum 30-piece production sample. (2) Measure each piece. (3) Calculate C_pk. (4) If C_pk ≥ 1.33, attach the data to Form 3. (5) If C_pk < 1.33, either improve the process or implement 100% inspection with documented results.

Mistake 6 — Unsigned or Undated Forms

AS9102 requires that the FAIR be signed and dated by an authorized representative — typically the supplier’s quality engineer or delegated signatory. Each form (Form 1, 2, and 3) must carry the printed name, title, signature, and date of the approving authority.

A single missing or undated signature field is sufficient grounds for complete rejection, regardless of whether all measurements conform. Electronic signatures are acceptable provided they meet the customer’s digital record requirements and leave a traceable audit trail.

Fix. Before submission, verify every signature block on every form is complete: printed name, title, signature (or compliant e-signature), and date. If your organization uses e-signatures, confirm the customer accepts them and that the audit trail is intact.

Mistake 7 — Out-of-Spec Measurement with No Disposition

A characteristic is measured outside tolerance, recorded faithfully on Form 3 — but no Non-Conformance Report (NCR), deviation, or waiver is attached. AS9102 Section 5.4 requires that every out-of-spec finding has a formal disposition before submission.

The disposition must be one of: (1) use-as-is (with customer approval), (2) rework to conform, or (3) scrap. For aerospace FAI, use-as-is requires explicit customer engineering disposition — the supplier cannot self-approve.

Fix. Before submitting the FAIR package, cross-check every Form 3 result against its tolerance. For any out-of-spec reading, attach the NCR number, the customer-approved disposition (deviation/waiver), and the corrective action plan. No orphan rejects allowed.

Mistake 8 — Missing Functional Test Results

The drawing calls for a functional test (pressure test, torque verification, electrical continuity, leak test, etc.) but the FAI report contains no test results or the test method is not documented. Functional requirements are design characteristics just like dimensions — they must be ballooned, listed on Form 3, and verified with actual test data.

Fix. Identify every functional requirement on the drawing (look in the notes section, specification references, and performance requirements). Balloon each one. Record the test method, equipment used (with calibration due date), and actual results on Form 3. Attach the raw test data.

Mistake 9 — Incomplete Sub-Tier Supplier Documentation

Form 1 requires an index of all sub-tier drawings and suppliers. When a part has sub-assemblies or purchased components, each must be listed with its own part number, revision, supplier, and FAI status. Missing sub-tier documentation is a frequent rejection for assembly-level FAIs.

Fix. Build a complete bill of materials (BOM) index before starting the FAI. For each sub-tier item: record the part number, revision, supplier name, and whether a separate FAI is required or if it is covered by the current report. Verify all sub-tier FAIs are current and approved.

Mistake 10 — Measurement Equipment Calibration Lapsed

The inspection results on Form 3 were generated using measurement equipment whose calibration has expired. AS9102 requires all measurement equipment to be calibrated and traceable to national standards (NIST or equivalent). If the calibration due date on any gauge, CMM, micrometer, or optical comparator has passed, the measurements are invalid.

Fix. Before the FAI, verify calibration status of every piece of measurement equipment. Record the equipment ID, calibration date, and due date on the FAI report (or in an attached equipment log). If any equipment is out of calibration, re-calibrate and re-measure.

Mistake 11 — Process Change Not Triggering Re-FAI

AS9102 Section 4.6 defines specific triggers that require a partial or full re-FAI: change in manufacturing location, change in process (including CNC program changes that affect characteristics), change in tooling, change in material source, or production break of more than 2 years. Suppliers who make these changes without triggering a re-FAI risk lot rejection and potential customer audit findings.

Fix. Maintain a change-notification procedure that maps every AS9102 trigger to a customer notification and re-FAI assessment. Before changing a CNC program, tool, material source, or production location, check whether the change triggers a partial or full re-FAI per AS9102 Section 4.6. Document the assessment.

Mistake 12 — Ballot Number Sequence Errors and Cross-Reference Failures

Balloon numbers on the drawing do not match the sequence on Form 3, or numbers are duplicated, skipped, or assigned to the wrong characteristic. This makes it impossible for the customer reviewer to trace a measurement result back to the drawing callout — a fundamental FAI requirement.

Common causes: manual balloon numbering errors, multiple inspectors working on the same drawing without coordination, or drawing revisions that add/remove characteristics without re-balloonning.

Fix. Use sequential, unique balloon numbers with no gaps. If a characteristic is added after a revision change, re-number the entire drawing or use a documented amendment system. Cross-check every balloon number on the drawing against Form 3 line items before submission. Auto-balloon software can eliminate this class of error entirely.

Pre-Submission Checklist — 12-Point FAI Review

#	Check	Form	Rejection if missed
1	Every design characteristic ballooned and on Form 3	Form 3	~38% of first-time rejections
2	Drawing revision matches current released revision	Form 1	Full resubmission required
3	Material certs complete with heat/lot traceability	Form 2	FAIR rejected until certs provided
4	All special process suppliers Nadcap-accredited (current)	Form 2	FAIR invalid for that process
5	Key Characteristics have C_pk ≥ 1.33 (30 pcs min)	Form 3	KC evidence insufficient
6	All forms signed, dated, with authorized names	All	Immediate rejection
7	Every out-of-spec result has attached disposition	Form 3	Orphan rejects not allowed
8	Functional test results recorded with method and equipment	Form 3	Missing verification
9	Sub-tier supplier index complete	Form 1	Incomplete BOM
10	All measurement equipment calibration current	Form 3	Measurements invalid
11	No unreported process changes since last FAI	Form 1	Re-FAI trigger missed
12	Balloon numbers sequential, no gaps or duplicates	Form 3	Cross-reference failure

Standards & Sources

Primary standardsAS9102C (2023) Aerospace First Article Inspection Requirements — the current revision. Defines Form 1, 2, 3 structure; balloon documentation requirements; partial/re-accomplishment triggers; nonconformance handling.
EN 9102 (2024) European equivalent, published by AECMA. Technically aligned with AS9102C.
AS9103 Management of Key Characteristics — defines KC identification, C_pk requirements, and statistical process control expectations.
AS9100D §8.5.1.1 First Article Inspection — the QMS clause that invokes AS9102 for aerospace production.

Supporting referencesAIAG 8D Eight Disciplines problem-solving — the standard reject-resolution workflow.
PRI eAuditNet Nadcap accreditation database — verify special process supplier status.
ISO 9001:2015 §8.6 Release of products and services — general inspection and release requirements.

Frequently Asked Questions

What is the most common reason AS9102 FAI reports get rejected?

Missing or unballooned characteristics on Form 3, accounting for approximately 38% of first-time FAIR rejections. Every design characteristic on the drawing — dimensions, tolerances, GD&T callouts, surface finishes, notes, flag notes — must be uniquely ballooned and listed on Form 3 with actual measurement results. A single missed note is sufficient for rejection.

Do I need a ballooned drawing as part of my FAI submission?

Yes, in practice. AS9102 Section 5.2 states: “Verify that every design characteristic requirement is accounted for, uniquely identified and has inspection results traceable to each unique identifier.” While the standard does not explicitly mandate a physical ballooned drawing, most aerospace customers interpret “uniquely identified” to require a ballooned document (drawing, 3D model, or purchase order) as part of the FAIR package. Check your customer’s specific quality requirements (e.g., Boeing BAC, Airbus AIPS, or Pratt & Whitney ASQR-01) for explicit ballooned drawing requirements.

What Cpk value is required for Key Characteristics on AS9102 Form 3?

C_pk ≥ 1.33 based on a minimum sample of 30 consecutive production pieces. If the process cannot demonstrate C_pk ≥ 1.33, AS9102 requires 100% inspection of the Key Characteristic with documented results. A single measurement on one part is not acceptable evidence for a KC. Per AS9103, KCs are identified on the drawing with a triangle symbol and must be explicitly flagged on Form 3.

Can I submit an AS9102 FAI if a material cert is missing one piece of data?

No. Form 2 requires complete material certification for every material on the drawing BOM: chemical composition, mechanical properties, heat/lot number, and supplier identification. A cert missing any required data element renders the FAI incomplete. Obtain the complete cert from the material supplier before submitting. If the original cert cannot be obtained, the material must be re-tested by an accredited laboratory.

How do I verify my special process supplier’s Nadcap accreditation is current?

Search the PRI eAuditNet database (the official Nadcap accreditation registry managed by Performance Review Institute). Verify: (1) the supplier is listed, (2) the accreditation scope covers the specific process you need (e.g., heat treatment per AMS 2770, NDT per AC7114, chemical processing), and (3) the accreditation has not expired. Even a one-day lapse invalidates the FAIR for that process. Check before every FAI submission, not just at initial qualification.

When does a process change require a new FAI per AS9102?

AS9102 Section 4.6 defines these triggers for partial or full re-FAI: (1) design characteristic change affecting form, fit, or function; (2) change in manufacturing location; (3) change in process (including CNC program changes that affect characteristics); (4) change in tooling; (5) change in material source; (6) change in inspection method; (7) production break of more than 2 years; (8) completion of corrective action from a prior FAI. When in doubt, assess the change against the standard and notify the customer before proceeding.

What happens if a dimension measures out of tolerance during FAI?

Record the actual measurement honestly on Form 3, then immediately open a Non-Conformance Report (NCR). The NCR must have a formal disposition before the FAIR can be submitted: use-as-is (with customer engineering approval), rework to conform, or scrap. You cannot submit an FAIR with an out-of-spec result and no disposition attached — this is one of the 12 most common rejection reasons.

Sources & Standards Referenced

AS9102C (2023): Aerospace First Article Inspection Requirements, SAE International
EN 9102:2024: Aerospace series — Quality systems — First article inspection requirements, AECMA/UNI
AS9103: Management of Key Characteristics, SAE International
AS9100D: Aerospace Quality Management Systems, SAE International, Section 8.5.1.1
IAQG AS9102 FAQ Document: Frequently Asked Questions prepared by IAQG AS/EN/SJAC 9102 Review Team
PRI eAuditNet: Nadcap accreditation database, Performance Review Institute
iFactory: Quality Inspection Process — Why FAIRs Get Rejected: The 7 Most Common Failures (2026 analysis of Tier 1/Tier 2 aerospace supplier rejection data)
Fictiv: First Article Inspection (FAI) Guide for Engineers & Manufacturers (2025)

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