Missing Tool Protocol: What to Do When a Tool Is Lost

The Rule That Cannot Bend

In a FOD Critical area, the guide’s position is that the job stops until the tool is found or formally cleared by a second qualified authority, and that this rule has to be applied without exception. Each time an organization waves it through with a line like it is probably in the toolbox and will turn up, the protocol gets weaker for every later occurrence. It is only as strong as its least-enforced application.

This response sits inside the wider tool control program. Audits and counts find the discrepancy; the protocol governs what happens next. Any audit score below 100% triggers it.

The Missing Tool Protocol, Step by Step

1. Stop. The technician who identifies the missing tool announces it immediately. Work stops in the affected area. The aircraft, equipment or assembly is not moved, panels are not closed and the area is not released.
2. Contain. Secure the immediate area, limit movement to essential search participants and prevent anyone from removing items from the area.
3. Search, Phase 1. The technician who used the tool searches the immediate work area, tool board, pockets, cart and any adjacent surface. If found, document it and resume work.
4. Search, Phase 2. If the tool is not found within 15 minutes, expand the search to the full team. Search systematically: the work area including floor, under equipment and inside any open cavity; the path between the work area and the tool board; adjacent areas; trash containers, where every item is examined; and the technician clothing and PPE.
5. Escalate. If the tool is not found within 30 minutes, notify the supervisor, quality and safety. The supervisor takes over coordination of the search.
6. Search, Phase 3. A supervisor-directed search can include inspecting all open cavities with a borescope or mirror, searching adjacent aircraft or equipment, reviewing any available camera footage and interviewing everyone in the area during the relevant time window.
7. Clear or escalate further. If the tool is found, document the location, time and circumstances, and analyze why it was where it was and what control gap allowed it. If it is not found after an exhaustive search, a formal risk assessment determines whether the aircraft or equipment can be released. That assessment must be signed by a second qualified authority independent of the immediate work team. For the highest-risk scenarios, such as a tool missing after engine internal work, the default position is that the aircraft does not fly, or the equipment does not operate, until the tool is found or the area is disassembled far enough to confirm the tool is not there.
8. Document. Whatever the outcome, record the tool description and serial number, the task being performed, the time the tool was last seen, the time it was reported missing, the search steps and duration, the outcome and any corrective actions identified.

That last step matters more than it looks. The documentation feeds trend analysis: recurring missing-tool events in the same area or with the same personnel indicate a systemic problem, not bad luck. Feed those events into a repeat FOD investigation worksheet.

Broken-Tool Reconciliation

A broken tool is a missing tool in waiting, because a fragment can go missing while the main body of the tool is in your hand. When a tool breaks during use, the guide requires that every fragment be accounted for:

1. Stop the task immediately. Do not keep working in the hope the missing piece will turn up later.
2. Recover all visible fragments and collect them in a clear bag or container.
3. Reconstruct the tool if possible. For a broken drill bit, fit the pieces together to confirm all parts are present. For a shattered item, count fragments and compare to the number expected from the break pattern.
4. If any fragment is unaccounted for, escalate to the missing tool protocol and treat the fragment as FOD in a critical area until it is found or formally cleared.
5. Document the breakage: tool ID, task, location, fragments recovered, fragments expected and disposition.

A common audit failure mode is a broken tool recorded as disposed of while its fragments were never reconciled. Clear bags or containers, such as a personal FOD bag, make the recovered pieces easy to count and verify.

Making the Protocol Work in Practice

A few practical points follow from the procedure. The guide sets time triggers of 15 and 30 minutes, so making sure every technician knows them is a sensible step. Post the steps where work happens with clear FOD signs, and use FOD stickers on tools and containers so ownership and area are obvious. A visual inventory makes an absent tool obvious early; see shadow boards for tool control.

Also note that the guide scales the response by area. In FOD Control and FOD Awareness areas, the protocol calls for a search and a report, but stop-work may not be required if the area is physically separated from critical systems and the tool cannot credibly have migrated to a critical area. In Critical areas, there is no such flexibility.

Where to Go Next

The complete guide includes the full tool control chapter, and the free toolkit adds supporting forms. Request the free 216-page guide and use it to standardize your response before the next tool goes missing.