AS9100 Routing in Practice: How One Aerospace Shop Cut Audit Findings to Zero
Background: 14 Findings, Three Major
In 2023, a 30-person aerospace sub-tier supplying landing-gear components received 14 findings during their AS9100 surveillance audit — three major. The findings clustered into three areas:
- Quantity accounting gaps — counts at routing transfer points did not reconcile.
- Inadequate first-article evidence — operators were not consistently recording in-process inspection data.
- Missing ITAR access controls — drawings were viewable by personnel without verified US person status.
The shop's quality manager was experienced and conscientious. The problem was not people. The problem was that the routing system — paper travelers, an Excel scrap log, and a network-share drawing folder — could not enforce the controls AS9100 Rev D and Section 8.5.4 of the standard required.
For background on aerospace operations see aerospace & defense manufacturing and quality inspection fundamentals. The parent company research catalog is at wecr8.info/blog.
The Three Things That Had to Change
1. Quantity Accounting Enforced at Every Operation
AS9100 expects that for every operation, the operator records completed + scrap + rework, and that the total equals the quantity received from the prior operation. Paper travelers let operators write any number. They had to enforce the equation at submit time.
The fix: every operation submit form computed completed + scrap + rework = original quantity, and refused to advance the work order if the math did not balance. Scrap and rework required a reason code drawn from a controlled vocabulary. The same logic is documented in our quality inspection reference.
Result: Quantity accounting findings went to zero across the next two audits.
2. First-Article and In-Process Inspection at the Point of Work
First-article was being done — the evidence was just scattered across operator notebooks, a digital camera SD card, and the inspection bench. Auditors could not reconstruct who measured what, when.
The fix: every operation step had inspection prompts tied to the controlled drawing revision. Operators measured, recorded, and attached photo evidence at the station. The inspection record was timestamped, attributable to a named operator, and immutable after submit.
Critical sub-rule: any operator performing first-article inspection had to be currently qualified on the operation type. Qualification was tracked through the Operator Acceptance Program — the same kind of structured certification used for AS9100 personnel competency requirements.
3. Document and Drawing Access Locked to US Person Status
ITAR (22 CFR §120.15) requires that controlled technical data be accessible only to verified US persons or appropriately authorized foreign nationals. The network share could not enforce this — anyone with a login could open any drawing.
The fix: every controlled drawing carried an ITAR classification flag. Access required a verified US person declaration on the user record. Foreign-national personnel were blocked at the file level, not by policy memo. Audit logs recorded every view of every controlled drawing.
This is the same access pattern used by the G-Code Academy for controlled-program training material. For ITAR-aware shops see also the broader industrial manufacturing and contract manufacturer guidance.
Results Across Two Audit Cycles
| Audit | Year | Findings | Major | Minor | Observations | |---|---|---|---|---|---| | Surveillance | 2023 | 14 | 3 | 8 | 3 | | Recertification | 2024 | 4 | 0 | 2 | 2 | | Surveillance | 2025 | 0 | 0 | 0 | 0 |
The 2025 auditor's verbal feedback was that the digital evidence trail made the audit faster than any previous visit — they sampled more records in less time and found nothing to chase.
What This Looks Like Day to Day
For the operator: every operation has a clear submit form with inspection prompts pre-loaded for the current drawing revision. Quantity entered must balance. Scrap requires a reason. The system will not let them advance otherwise.
For the supervisor: the shift handoff carries forward open inspections, rework queue, and any flagged nonconformances. Nothing is verbal-only.
For the quality manager: the audit trail is queryable by job, operator, operation, drawing revision, and date. No hunting through binders.
For the owner: cost-per-part is visible by job, by shift, by operation. The same data backs the OEE bottleneck case study approach for ongoing improvement.
How This Connects to the Broader Methodology
The same principles apply to ISO 9001 shops, IATF 16949 automotive shops, and ISO 13485 medical device shops — see medical device manufacturing and industry glossary for the standard-by-standard differences.
The setup discipline behind a clean audit also requires the floor-level habits in our 5S CNC implementation guide and the inspection equipment maintained per measuring tools reference.
For controlled-document and equipment evidence, see the equipment manual library and the manufacturing guides hub.
The People Behind the Standards
AS9100 grew out of the same quality-engineering tradition built by W. Edwards Deming, Joseph Juran, Walter Shewhart, and Genichi Taguchi — profiled in our manufacturing pioneers reference. The control-chart and acceptance-sampling math underneath modern aerospace audits is their work, applied at scale. More historical context lives at wecr8.info/blog.
Want the Same Result?
JobLine.ai was designed against AS9100, ISO 9001, and ITAR controls from day one. See the platform or explore aerospace-specific features. For careers building this work, see manufacturing careers.