Investigation completed (b)(6) 2017.Device history record reviewed for product id: a3059 work order 1640724, serial # (b)(4), manufactured on 09/26/2016 show no abnormalities related to the reported failure.The devices manufactured during this period passed all required inspection points with no associated mrr¿s, variances or rework.No service history is on file for this device.No manufacturing or design related trend has been identified.Post market information will continue to be monitored.Root cause undetermined based on unit not returned for analysis after several documented attempts.
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