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High Potential Risk Incident Boom Truck Contact With Worker

High Potential Risk Incident Boom Truck Contact With Worker. The Incident. On Dec 2, 2010 an equipment operator inadvertently made contact with 2 mechanics (pedestrians) while moving his boom truck. This resulted in a first aid to one of the mechanics who suffered a contusion to his leg.

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High Potential Risk Incident Boom Truck Contact With Worker

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  1. High Potential Risk Incident Boom Truck Contact With Worker

  2. The Incident • On Dec 2, 2010 an equipment operator inadvertently made contact with 2 mechanics (pedestrians) while moving his boom truck. • This resulted in a first aid to one of the mechanics who suffered a contusion to his leg.

  3. Incident Details • The operator entered the 7500 Level with his boom truck and encountered a parked maintenance pickup truck. • The maintenance personnel had just finished repairs on a loader parked ahead of them in the drift.

  4. Incident Details Boomtruck operator’s Initial intent was to enter Here and drive around Loop to deliver material Area was blocked by The fuel truck and 50 ton haulage truck Boomtruck operator decided to enter onto the level in this direction.

  5. Incident Details • The boom truck operator had parked his vehicle approximately 5 feet behind the pickup. • With the loader repairs complete came the request for the boom truck operator to exit the level in order to allow the Toyota and scoop tram to pass.

  6. Incident Details • Maintenance Toyota Pickup • At the same time the two mechanics placed themselves between the front of the boom truck and the back of the Toyota to load their tools into the truck box.

  7. Incident Details • The operator did not notice that the mechanics were there. • The mechanics thought he was aware.

  8. Incident Details • The ambient noise levels were high. • The mechanics were not aware that the Boom Truck may have been running. • They did not hear a start up alarm, back up alarm or horn

  9. Incident Details 98 db 94db 90db 80db

  10. Boom Truck Engine Compartment – Horn Placement Horn mounted near front of engine (100 dB at 3 feet)

  11. Incident Details • The operator's intention was to back out of the level • While looking over his left shoulder, he inadvertently left the transmission selector switch in neutral which allowed his boom truck to roll forward approximately four feet • He did not sound his horn to back up.

  12. Boom Truck Operator’s Control Panel Audible Alarms and Lights Selectors Drive Selector Switches • Speed Selector • (Normally left in second) • First gear • Second gear • Third gear • Directional Selector • (Must be in Neutral to start) • Reverse • Neutral • Forward

  13. Incident Details • One mechanic was brushed out of the way with no injuries. Operator in Cab Position of partner brushed aside

  14. Incident Details • The other had his legs slightly pinned between the boom truck‘s bumper & the Toyota’s open tail gate

  15. Investigation Findings • Immediate Direct Cause: • Operator did not use his horn when backing up. • Workers placed themselves between two pieces of equipment while putting their tools away. • Operator inadvertently put gear selector in the improper position. • Background noise was loud enough to mask the sound of the engine.

  16. Investigation Findings • Basic Underlying Cause: • Workers did not believe the boomtruck would be moving while they were putting their tools away, placed themselves in the “No-Go Zone”. • The sounding of horns for moving equipment had not been enforced consistently. • There is no standard for U/G equipment alarm/horn loudness and frequency • Boomtruck operator had inadvertently placed the gear selector in the wrong position in the past without incident. • The OEM did not realize the inherent hazard with the present selector switch group.

  17. Recommendation/Actions • Hazard Alert on the need to sound the horn when moving equipment forward or reverse was issued. • Audit and enforce program standards - Forward/Reverse sounding, No Go Zone enforcement. • Investigate the possibility of having a standard for gear selector switches for mobile equipment. • Investigate the possibility of purchasing a worker proximity device installed on mobile equipment. • Refine existing refresher training module to increase worker awareness of the hazards of working around mobile equipment. (Circle check, Face to Face Communication, Line of sight, Awareness of changing conditions and surroundings)

  18. Moving Forward • Horn Standard for U/G Equipment • Specification for equipment operator controls. • Input from Safety Associations, Industry (OEM) and Mines related to mobile equipment interaction with people.

  19. Thank You! • Questions?

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