Defects Found Before an Urgent Delivery
You are the driver of an 18-tonne rigid truck loaded for a 09:00 delivery. At 08:05, during your walk-around check, you find: a bulge on the near-side front tyre sidewall; tread depth on that tyre is 1.2 mm across the centre (the legal minimum for this vehicle class is 1 mm); the ABS warning light stays on after the ignition check; and the air-pressure gauge takes longer than normal to build, with a faint hiss near the rear axle. The transport manager says the load is urgent and asks you to 'take it easy' and deal with it after the delivery. The delivery is 35 minutes away. You have a spare wheel but no fitting equipment. Tasks: identify which defects are immediate prohibitions, whether the tyre tread is legal, what you should do about the ABS and air leak, and how you respond to the manager.
1. Which findings make the vehicle unroadworthy, and why?
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Immediate prohibitions. The sidewall bulge is a structural tyre failure waiting to happen; the tyre must not be used. The air leak and slow pressure build point to a brake or air-system fault; loss of air pressure can reduce or disable braking, so the vehicle must not be driven. The ABS warning light means the anti-lock function is faulty; braking may still occur, but wheel-lock protection is lost, and on an air-braked truck this needs diagnosis. Tread. At 1.2 mm the tyre is not necessarily below the legal minimum for this class (1 mm), but it is marginal, and the bulge condemns it anyway. Decision. Do not take the load; the combination is unsafe.
2. How should you respond to the transport manager's instruction?
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Response. Refuse to drive and explain the specific defects, not just 'it feels wrong'. Record them on the defect report and notify the transport manager in writing or by the company's defect system. The manager's instruction cannot override your legal duty not to use a vehicle in a dangerous condition. Pressure. The 35-minute delivery is not a defence. Ask for recovery, a spare vehicle, or a tyre fitter. If the manager insists, escalate to the operator's compliance manager or safety officer. Record. Note the time, defects, and decision; this protects you and the operator.
3. What would you check or record before the vehicle is returned to service?
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Before return to service. The tyre must be replaced or assessed by a competent fitter; the air leak traced and repaired; the ABS fault diagnosed and the warning light cleared; brake performance checked. A road test may be needed. Records. Complete a new walk-around check, sign the defect record off, and ensure the maintenance provider documents the repair. If the ABS light remains on, do not accept the vehicle. Load. Check that the load was not damaged and is secure before departure. The vehicle should not leave the yard until the defects are cleared.