This follow-up report is being submitted to relay additional information/final report for (b)(4).The event is confirmed.Review of the most recent repair record determined the unit was confirmed to have unstable motor speed, the control bar was thin on the ends and was not in the correct position, was out of calibration and a damaged machined head.The motor, shaft bearings, sleeve bearings, screws, control bar, and machined head were replaced and resolved the reported issue.A definitive root cause cannot be determined.If any further information is found which would change or alter any conclusions or information, a supplemental report will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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