Dangerous incident report

October 31, 2017 Tara

Dangerous incident

Summary: A mining haul truck operator reportedly lost steering. After trying to turn both ways he applied the brake. The truck ran into a windrow.

Recommendations to industry: Hazard: velocity/inertia of vehicles.
Risk: harm to people from the unexpected movement of mobile plant.
Recommendations:
The steering system is a safety critical system that is fundamental to the safe operation of mobile plant.
  • Steering systems should be maintained to achieve the highest degree of reliability over the mobile plant’s lifecycle.
  • Steering systems should be maintained in accordance with the original equipment manufacturer’s (OEM) information.
  • Assess steering failure risks by considering failure modes of steering systems.
  • Carry out daily prestart safety checks.
  • Mobile plant operators should be familiar with emergency procedures.
  • Install windrows as a mitigation control.

Refer to: 
SB10-03 Mobile plant – safety critical systems
SA06-12 Maintenance of safety critical systems – braking, steering and warning systems

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