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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 201925112 - Employee Is Struck By Hold Valve And Is Killed

Accident: 201925112 -- Report ID: 0626700 -- Event Date: 04/30/2010
InspectionOpen DateSICEstablishment Name
31292214905/01/20101771Golden Arrow Concrete Pumping Inc.
At approximately 6:00 p.m. on April 30, 2010, an employee, a maintenance employee, was retracting the extended concrete pumping boom on a Sany SYG5502THB 60M, SZ, concrete pumping truck. The truck was new and was being placed in service. The employee and a coworker, a technical representative of the truck manufacturer, were working together to diagnose the malfunction. The employee had removed the hydraulic cylinder lines to the boom section 3 hydraulic holding valve and bled the unit. The employee was removing the valve mounting bolt when stored hydraulic pressure in the cylinder released, violently expelling the holding valve and mounting bolt. The employee was struck in the upper chest by the valve body, and high pressured hydraulic fluid nearly severed his lower right arm. He was taken to the hospital, where he died at approximately 7:30 p.m. April 30, 2010.
Keywords: hydraulic cylinder, lockout, valve, struck by, flying object
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Contractor's yard/facility Maintenance or repair $50,000 to $250,000 X
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 312922149 Fatality Bruise/Contus/Abras Heavy equipment mechanics FallDist:
Cause: Pouring concrete floor at grade
FatCause: Struck by falling object/projectile

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