Summary
Most FAI rejections come from documentation errors, missing characteristics, or revision mismatches. This post outlines the most common causes and the steps that prevent rework and resubmissions.
Key takeaways
- Most FAI rejections stem from documentation errors, not part nonconformance.
- Missing characteristics, wrong revisions, and form errors are common causes.
- Complete supporting evidence prevents delays and resubmissions.
Top 5 reasons for First Article Inspection rejection (and how to avoid them)
Getting your AS9102 First Article Inspection Report rejected is frustrating, costly, and delays shipments to customers. Whether you are submitting to a prime contractor like Lockheed Martin or a commercial aerospace customer, FAIR rejections follow predictable patterns. Understanding the most common errors -- and how to prevent them -- improves first-pass acceptance rates and keeps your production schedule on track.
Why FAI rejections matter
A rejected FAIR means no shipments until you complete corrective actions, manufacture new parts, and resubmit for approval. The downstream impact includes:
- Production delays while rework completes
- Expediting costs to maintain customer schedules
- Damaged supplier reputation with the customer
- Quality team resources diverted to fix preventable errors
- Lost revenue opportunities when delivery windows close
Most rejections stem from documentation errors rather than actual part nonconformance. The hardware might be perfectly compliant, but incomplete or inaccurate paperwork leads to rejection just as quickly as dimensional discrepancies. The good news: these errors are preventable with proper planning and the right quality management tools.
The top 5 FAI rejection reasons
Based on industry guidance from major aerospace primes, here are the most common reasons First Article Inspection Reports get rejected:
1. Missing characteristics or notes
Every dimension, note, and requirement on the engineering drawing must appear in your FAIR with a recorded measurement. Using "accept" or "OK" without actual measurement data is unacceptable.
This includes dimensions embedded in specifications for commercial off-the-shelf (COTS) hardware. If your assembly drawing calls out a connector per MIL-DTL-38999, the hole dimensions specified in that standard must be measured and documented even though they do not appear on your drawing.
2. Incorrect or missing special process documentation
Special processes -- heat treating, plating, welding, NDT -- require certifications from approved suppliers. Common errors include:
- Using processors not on the customer's approved supplier list
- Missing or expired special process certifications
- Incorrect specification revision levels
- Incomplete special process hierarchy on Form 2
Customers maintain approved supplier databases (often accessible through Exostar or similar portals). Verify your special process suppliers are approved before starting production, not after completing inspection.
3. Wrong revision level
Working to outdated engineering is one of the fastest ways to fail a FAIR. Ensure your purchase order revision matches released engineering for the part number, including:
- Drawing revision level
- Specification revisions called out on the drawing
- Model file version for Model-Based Definition (MBD) parts
- Engineering change notices (ECNs) incorporated
Always verify you are working to the latest released engineering before starting production. That "R" symbol in the upper right corner of most drawings indicates released status -- if you do not see it, contact the customer to confirm.
4. Incomplete or incorrect form data
Form errors are surprisingly common and completely preventable:
- Wrong part numbers (typos, missing dash numbers, missing suffixes like Q1 or D1)
- Unsigned or undated forms
- Parts listed on wrong forms (assembly components belong on Form 1, not scattered across Form 3)
- Missing multiple actuals when features repeat (for example, 12 places requires 12 measurements or min/max range)
- Incorrect tolerances applied to dimensions
These administrative errors do not reflect hardware quality, but they indicate poor attention to detail and trigger rejections just like actual nonconformances.
5. Missing supporting documentation
Your FAIR package requires complete supporting evidence:
- Material certifications (mill certs, C of C)
- Special process certifications and test reports
- CMM reports referenced in Form 3
- Sub-tier supplier FAIRs for components
- Functional test results
Submitting incomplete packages forces the customer's quality engineer to request additional documentation, delays approval, and increases rejection risk. Ensure every measurement, material, and process has objective evidence before submission.
How GroundControl prevents these errors
GroundControl's AS9102 software is designed specifically to catch common FAIR errors before submission:
- Completeness checking: The system flags missing characteristics, ensuring every drawing requirement has a corresponding measurement.
- Revision control: GroundControl tracks drawing and specification revisions, highlighting mismatches before you submit.
- Form validation: Automated checks ensure data populates correct forms with required fields completed and signed.
- Documentation linking: Supporting documents attach directly to relevant characteristics, preventing missing certifications or test reports.
- Multi-place verification: When features repeat, the software prompts for multiple measurements or min/max ranges.
These built-in safeguards act like a quality engineer reviewing your work before customer submission, catching errors that cause rejections and allowing corrections while hardware is still in-house.
Improving first-pass acceptance
First Article Inspection rejection rates should approach zero with proper planning, attention to detail, and effective quality management tools. Most rejections result from preventable documentation errors, not actual part nonconformance.
By understanding common pitfalls and implementing systematic checks before submission, aerospace suppliers improve acceptance rates, reduce cycle times, and strengthen customer relationships. The best FAIRs are ones customers approve on first review -- because you have already caught and corrected any issues before they click "submit."
Want to eliminate errors in your AS9102 FAIRs? Try GroundControl and see how we help aerospace manufacturers achieve first-pass FAIR acceptance.
