This complaint is being reported by zimmer biomet as (b)(4).The customer returned an air dermatome device for evaluation.Zimmer biomet surgical has not previously repaired/evaluated the air dermatome.The device history record (dhr) 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.Initial qa inspection of the air dermatome revealed that the r.P.M.Was at the low end of the specification and ran erratically.Also the calibration was within specification and the control bar was in the correct position.The customer hose and width plates were not returned for evaluation.Repair of the air dermatome was performed by zimmer biomet surgical which included replacement of the thickness lever, reciprocating arm, bearings, seal and retaining ring, motor, poppet assembly, and o-ring.The air dermatome was then tested and functioned properly.It was repaired, inspected and tested.The reported event was confirmed since during the initial inspection it was noted that the motor speed operated at the low end of the specifications and ran erratically.While during the initial inspection it was noted that the motor speed operated at the low end of the specifications and ran erratically, it is unknown with the information that was provided how this occurred.Therefore, based on the information that was provided the root cause of the reported event could not be specifically determined.The air dermatome was repaired, tested and returned to the customer.
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