(b)(4).On 11 march 2019, it was reported from st.Vincent's private werribee that the motor on a dermatome was weak and stopped intermittently.The customer had returned a zimmer electric dermatome power supply serial number (b)(4) as well as a zimmer electric dermatome for evaluation.Evaluation of the power supply on (b)(6) 2019 by zimmer australia noted that when another electric dermatome was attached to the device, the dermatome ran very slow and weak.The power supply was sent to dover for further evaluation and repair and the dermatome was returned to the customer.Evaluation of the device on (b)(6) 2019 found that the power supply did not provide a stable dc voltage.Repair of the device occurred the same day and involved replacing the internal power supply within the power supply.The technician then tested and verified that the device was functioning as intended and the power supply was returned to the customer without further incident.The device was tested, inspected, and repaired.The device history record for zimmer electric dermatome power supply serial number (b)(4) was reviewed and noted no related non-conformances, requests for deviation (rfd), change notices (cn), or any other issues with manufacturing.The record review found no issues with the device and all verifications, inspections, and tests were successfully completed.While the service technician found that the power supply was not providing a steady dc voltage and that the power supply functioned as intended after the power supply within it was replaced, it cannot be determined from the information provided as to what caused the internal power supply to malfunction.Therefore, 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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