This event has been recorded by zimmer biomet under (b)(4).The investigation is complete.Review of the most recent repair record determined that the control bar was not in the correct position and the calibration was out at the 0, 4, and 12 readings.The fine adjustment cams, o ring on the swivel, vespel and semi-circle bearings were replaced.The control bar was set to the correct position and the device was calibrated and resolved the reported issue.Review of the previous repair record identified unrelated repairs to the reported event.The device was tested and found to be functioning to specifications prior to release to the customer.Device is used for treatment.A definitive root cause cannot be determined.No corrective actions, preventive actions, or field actions resulted after investigation of this event.The event is confirmed.
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