Case Study: Excavator Fire – Lessons in the Environment of working in the pacific regions

Background

A large excavator operating at a mining site suffered a catastrophic fire while in use. The operator detected a burning smell and, upon investigation, was alerted by a colleague to visible flames. Despite immediate evacuation and response efforts, the fire rapidly engulfed the machine, resulting in total loss of the operator's cabin and severe damage to the engine bay.

Investigation Findings

A forensic fire analysis identified the fire's origin and contributing factors:

• Hydraulic System Issues: The excavator had a history of hydraulic hose failures due to environmental factors, particularly corrosion caused by exposure to harsh conditions.

• Fire Source & Spread: A hydraulic hose failure due to the corrosion led to fluid leaking onto the turbocharger, which operates at extremely high temperatures—well above the autoignition threshold of hydraulic fluid.

• Suppression System Failure: A fire suppression system was installed but had not been inspected or maintained, rendering it ineffective at the time of the incident.

  
  

Key Learning & Recommendation

• Proactive Maintenance: Regular inspections and replacement of hydraulic hoses and clamps are essential, particularly in high-corrosion environments.

A fire on a mine site can lead to costly disruptions due to the loss of a critical machine. This is why strict adherence to preventative measures and a regular maintenance schedule is essential.