This event has been recorded by zimmer biomet under (b)(4).Review of the most recent repair record determined the unit was out of calibration at the zero reading.The motor, motor sleeve, spring seal, needle and ball bearings, vespel, semi circle bearings, and 2 and 4 inch width plates were replaced, the unit was calibrated, and the reported issue was resolved.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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