The Jammed Belt and the 22:15 Trailer
You are a mail handler on the evening tour at a sorting facility. At 21:40 a parcel jams the belt at the load station, where the interlock guard has been propped open with a plastic tote - a shortcut a coworker uses to save time. Your supervisor, watching the clock on a trailer that must pull at 22:15, says: "Just pull it out, it's a ten-second fix. We don't have time for a shutdown." The belt is still powered and upstream packages keep coming. Two other workers are within arm's reach of the rollers. You have been trained on the facility's lockout/tagout procedure, and you know the guard is an interlock device, not a decorative cover.
1. What do you do in the next 60 seconds? Explain what separates a safe outcome from an unsafe one here.
Read the worked answer
Act on the energy source, not the parcel.
- Hit the control that stops the belt (E-stop or the station stop) before anyone touches the rollers. Stopping is not the same as de-energizing, but it removes the immediate danger.
- Do not reach into the guarded zone. The jam is not the hazard - the powered rollers behind a defeated interlock are.
- Isolate per lockout/tagout: lock and tag, verify zero energy, then clear the jam.
- Tell the supervisor what you are doing and why, in one sentence: "Belt is stopped and locked out; I'll have it clear in two minutes."
The difference between safe and unsafe here is not speed - it's whether energy was isolated before a hand entered the zone. A propped interlock removes the engineered protection that exists precisely because people underestimate a ten-second fix. The 22:15 pull time is a schedule problem; a de-gloved hand is not recoverable on a schedule.
2. Your supervisor repeats the order and adds that your refusal will be noted. How do you respond?
Read the worked answer
Stay flat and factual; do not debate the supervisor's authority, debate the method.
- Restate the constraint: "I'm not refusing to clear the jam. I'm clearing it locked out. It's about ninety seconds longer."
- Offer a way to protect the pull time: divert upstream flow to the secondary belt, stage the trailer's remaining loads manually, or ask for a second handler to speed the clear once isolation is verified.
- Ask for the order to be given in a form you can act on safely - for example, a written instruction to bypass lockout. In practice that request usually ends the conversation, because the instruction cannot be documented.
- If pressure continues, escalate through the normal channel (safety officer, union steward, on-duty manager) and note time, words, and witnesses.
The judgment being tested is that a direct order does not transfer risk to the person who gave it. You still own your hands.
3. The jam clears, the trailer pulls on time, and nothing happened. What should be reported, and why does it matter?
Read the worked answer
Report the guard defeat, not just the jam.
- The propped tote is a hazard that will still be there tomorrow, and it will be used again because it "worked."
- File it as a hazard/near-miss report: interlock bypassed, who observed it, approximate time, station number.
- Follow up on the tote itself - remove it from the area so the shortcut isn't sitting there ready to use.
- Also flag any pressure to bypass, since that is the condition that produced the near miss.
A near miss with no injury is the cheapest possible warning. Treating it as "no harm, no report" guarantees the next instance is the one with harm.