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Additional information is provided in sections d.9, h.3, h.6 and h.11.A non-conformance based review of the serial number was performed and did not reveal any potential contributing factors to the reported complaint.A manufacturing device history record (dhr) review was performed prior to product release to ensure that the product was manufactured in compliance with the device master record.Based on the assessment, the product met release criteria.A review for complaints reported against this serial number was performed.No similar complaints were reported for the product serial under investigation.The product under investigation is not a serviceable device.Therefore, a service record review was not performed.A visual assessment of the returned sample revealed cable damage.The returned sample was connected to a calibrated system.The handpiece tuned successfully and completed a five-minute burn-in test with the system set at 100% ultrasonic and torsional power.No functional problem was found with the returned handpiece during testing at manufacturer site related to the reported event; therefore, the customer reported event was not able to be confirmed.Unrelated to the reported event, cable damage was found during a visual assessment.The returned handpiece was found to functionally exhibit no problems; therefore, the root cause of the reported event is inconclusive.Through investigation of this complaint, it has been determined that the product had no problem.Therefore, no corrective actions will be pursued at this time.Quality assurance has reviewed this complaint and will continue to monitor data for evidence of adverse trending and take further action, as appropriate.The manufacturer internal reference number is: (b)(4).
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