Forensic Engineers and Consultants

Tag Archive: machinery and equipment failure

  1. Case Study: Fatality Servicing Unsupported Excavator Boom

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    A mini-excavator at a job site developed a leak at a hydraulic fitting at the base of the cylinder that raises and lowers the boom. A subcontractor foreman at the site raised the boom to search for the leak. The foreman found and attempted to tighten the leaking fitting. When he did, the fitting separated from the base of the cylinder, releasing the hydraulic pressure that held the boom aloft. The boom fell and the bucket struck a nearby superintendent for the general contractor.

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  2. Improper Design Leads to Fatigue Failure In Blower Shaft

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    A blower used to exhaust air from an industrial process stopped functioning when the blower wheel drive shaft fractured.  The process, and thereby most of the plant, had to operate at a reduced volume until the blower wheel could be replaced.  The blower wheel had been installed during a shutdown a week before the incident.  The blower wheel was a spare installed when the existing blower wheel was sent for scheduled remanufacturing. (more…)

  3. Container Handler Fire

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    Container handlers are mobile, rubber-tired, machines that are used to load and stack standard containers at a variety of shipping terminals.  The machines resemble oversized forklifts but are equipped with shipping container lift spreaders instead of forks.  The machines are often equipped with sophisticated computer systems that inform the operator which container needs to be lifted as well as its destination, whether it is a truck, train, or storage stack. (more…)

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