Thyroid uptake system s/n (b)(6) was shipped on april 19, 2018.The technician was performing routine qc when the system's arm unexpectedly fell to its lowest position.Review by engineering indicated a spring arm failure.No injuries occurred.A replacement assembly was shipped and user instructed to return the defective part to manufacturer for engineering evaluation and identification of root cause.The collimator and arm weigh and spring arm assembly weigh 45 pounds, which has the potential for serious injury to either patient or operator.
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