AS9100 and FOD Prevention: What Auditors Actually Evaluate

When an AS9100 auditor arrives at an aerospace shop, FOD (Foreign Object Debris) prevention is almost always one of the points examined closely. It's not an isolated checkbox — it's an indicator of the overall rigor of the quality system. Here's what is concretely evaluated on the floor, and how to prepare for it.

Program documentation, first and foremost
An auditor almost always starts by asking to see the written FOD prevention procedure: who is responsible, how often areas are inspected, how incidents are logged and corrected. The existence of the document isn't enough — the auditor will verify that what's written matches what's actually done on the floor.

Visual tool control on the floor
This is often the most revealing moment of an audit. The auditor observes whether each tool has an assigned, visible place — shadow boards, cut foam inserts, clearly identified individual pouches. A workstation where tools are left lying around, where nothing immediately signals a missing object, draws attention right away.

Traceability of personal tools
In many shops, each technician has their own toolkit or pouch. The auditor may ask how you ensure no personal tool is ever left behind in a cell or engine at the end of a shift. A dedicated FOD pouch, separate from the general toolbox, with an end-of-task check, is a concrete and easy-to-demonstrate answer.

Team training and awareness
A FOD program that looks solid on paper but is poorly understood by technicians won't hold up under audit. Auditors often ask employees direct questions on the floor: what do you do if you find an unidentified object? How do you report a missing tool? Consistency of answers across stations matters as much as the procedure itself.

Non-conformance follow-up
Finally, the auditor will generally ask for the history of FOD incidents over recent months: were they documented, analyzed, and did corrective actions actually change anything? A shop that can show measurable improvement over time sends a far stronger signal of maturity than a simple empty log.

In summary
FOD prevention is never evaluated as an isolated element — it reflects the overall quality culture of the shop. Simple but visible equipment, like an individual FOD pouch per technician, doesn't replace a well-documented program, but it becomes tangible proof of it on audit day.