The complaint is being reported by zimmer biomet as (b)(4).The device history record (dhr) for the totalshield surgical helmet, part number (b)(4) and lot number 63196993, review noted no related non-conformances, requests for deviation (rfd), change notices (cn), or any other issues with manufacturing.The dhr review found no issues with the device and all verifications, inspections, and tests were successfully completed.A returned product investigation was performed on the totalshield surgical helmet.The physical evaluation revealed that the returned helmet had a broken fan and also produced a burnt odor.The results of the returned product investigation have confirmed the reported event.While the returned product investigation confirmed that the totalshield surgical helmet fan was broken and producing a burnt odor, it cannot be determined from the information provided what actually caused the reported event.Therefore, based on the information provided, a specific root cause of the reported event cannot be determined.The investigation was based on the information that was provided initially and any information that was obtained throughout the follow-up process.
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