Form 3 is where most first article inspections actually fail — not because the part is wrong, but because someone tried to summarize instead of individually verifying every characteristic. The three FAIR forms explained, and when a new FAI is required.
Form 3 is where most first article inspections actually fail — not
because the part is wrong, but because someone tried to summarize
instead of individually verifying every single characteristic called
out on the drawing.
AS9102 is the aerospace standard governing First Article Inspection
(FAI) — a full, ground-up verification that a part, made using a
representative production process, actually conforms to every
requirement on its engineering drawing before that process is approved
for ongoing production. It’s mandatory in aerospace and aviation, and
the same discipline shows up in automotive, medical device, and
broader defense contracting as a production-validation gate.
| Form | What it documents |
|---|---|
| Form 1 | Part Number Accountability — identifies the part, revision, and where it fits in the overall assembly |
| Form 2 | Product Accountability — raw material and special process certifications (heat treat, plating, NDT, etc.) |
| Form 3 | Characteristic Accountability — every individual dimension, note, and drawing callout verified one by one against actual measurement data |
Form 3 requires every characteristic on the drawing — every
dimension, tolerance, note, and material callout — to be individually
numbered, measured, and recorded, cross-referenced back to the specific
balloon number on the drawing. The common mistake is treating this as a
summary exercise: skipping “obvious” or repeated characteristics,
grouping similar dimensions together, or leaving out notes that don’t
look like traditional dimensions. A customer reviewing a FAIR package
checks for that exact one-to-one completeness, and an incomplete Form 3
is the single most common reason a first article inspection gets
rejected and sent back.
A completed FAI isn’t permanent. A change in the design, a change in
the manufacturing process or its location, a break in production, or a
change of raw material source can all trigger a requirement for a new
or partial first article inspection — the original FAI only certifies
the specific combination of design, process, and location it was
performed under, not the part number in the abstract.
AS9102 first article inspection isn’t a standalone course in SCMEP’s
current catalog — it’s a practical extension of the quality fundamentals
covered in our AS9100 Overview and
connects directly to reading the drawings a FAIR verifies against. See
our related guide on how to
read a blueprint for the drawing-reading foundation FAIR depends on.
As a NIST Manufacturing Extension Partnership
affiliate serving South Carolina manufacturers since 1989, our focus
is connecting that drawing literacy to the discipline a complete FAIR
package actually requires.
If your shop is preparing first article inspections for an aerospace
customer, you can browse the Quality and
Inspection training catalog or email the training team.
AS9102 is the aerospace standard governing First Article Inspection (FAI) — a full verification that a part, made using a representative production process, conforms to every requirement on its engineering drawing before that process is approved for production.
Form 1 covers part number accountability, Form 2 covers product accountability including material and special process certifications, and Form 3 covers characteristic accountability — every individual drawing dimension and callout verified against actual measurement data.
Form 3 requires every single characteristic on the drawing to be individually numbered, measured, and recorded. The most common rejection cause is treating it as a summary and skipping or grouping characteristics instead of documenting each one individually.
A design change, a manufacturing process or location change, a break in production, or a change in raw material source can each trigger a requirement for a new or partial FAI, since the original FAI only certifies the specific design-process-location combination it was performed under.
