We completed our scheduled AS9100D recertification audit in February 2026. The audit covered our Shenzhen and Wuxi facilities over 5 days with 2 external auditors. Outcome: continued certification through March 2029 with zero major findings. This post covers what AS9100D actually requires, what the audit involves, and why aerospace customers should care.
AS9100D is the aerospace-specific quality management standard, built on ISO 9001:2015 with additional aerospace-specific requirements. Key elements that a certified supplier must maintain:
For transparency, here's what our audit covered over the 5 days:
| Day | Focus area |
|---|---|
| Day 1 | Opening meeting, documentation review (quality manual, procedures, forms). Review of management review meeting records and internal audit results from 2025. |
| Day 2 | Manufacturing process audit. Auditors walked the floor, observed setup, machining, inspection of specific aerospace jobs in progress. |
| Day 3 | Purchasing and supplier controls. Audit of incoming material records, supplier approvals, sub-tier process qualifications (heat treat, finishing). |
| Day 4 | Corrective action records. Review of non-conformance reports from 2025 — what was the issue, what was the root cause, what corrective action was taken, did it prevent recurrence? |
| Day 5 | Top management interview, closing meeting, findings summary. |
External auditors don't just check that procedures exist — they verify that procedures are actually being followed and that the evidence matches the documentation. They'll pick specific parts from the past year and trace them completely through the quality system.
For customers doing aerospace or adjacent work, AS9100D certification matters because:
| Certification | Scope | Valid through |
|---|---|---|
| ISO 9001:2015 | General quality management | October 2027 |
| AS9100D | Aerospace quality management | March 2029 |
| ISO 13485:2016 | Medical device quality | June 2028 |
| ISO 14001 | Environmental management | September 2027 |
IATF 16949 (automotive) is under evaluation; we expect certification decision by Q3 2026 if customer demand warrants. For customers currently in or entering aerospace, medical, or automotive supply chains, the appropriate certification is typically required before we can officially bid on the work.
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