This event has been recorded by zimmer biomet under (b)(4).D4 udi: (b)(4).This medwatch is being filed to relay additional information.The device history record (dhr) and previous repair report reviewed noted no related non-conformances, requests for deviation, change notices or any other issues with manufacturing or with the device.The dhr and previous repair report review also found that all verifications, inspections and tests were successfully completed.Product review of the air dermatome on (b)(6) 2020 revealed that the calibration was out of specifications at the zero setting only.The motor speed was erratic and the control bar was in the correct position.Repair of the air dermatome was performed by zimmer biomet surgical on (b)(6) 2020 which included replacement of the external e-ring, throttle hinge gasket, spring seal, planetary spacer, motor sleeve, motor, wing washer, and bearing nut.Air dermatome, serial number (b)(6), was then tested and functioned properly.While the returned product investigation confirmed that the air dermatome had an erratic motor, 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 device was noted to be functioning as intended after the external e-ring, throttle hinge gasket, spring seal, planetary spacer, motor sleeve, motor, wing washer, and bearing nut were replaced.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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