The device was returned to the manufacturer for repair and evaluation.The service record indicates that the device was manufactured on 12/4/1998 and was repaired on 9/28/2012 for service and calibration.Evaluation of the device of the device observed the device ran erratic and there was damage to the control bar.Prior to repair, the device was outside calibration specification at the zero, 0.0100" and 0.0200" thickness settings.In post-repair, corrosion of the exterior motor casing was observed.The motor operated erratically, but was within motor voltage specification.Given the corrosion on the motor casing, it is likely that the interior of the motor was corroded as well, which likely caused the device to become erratic and could have caused intermittent operation; however, the customer's reported event of intermittent operation could not be reproduced.The cause of the corrosion was likely due to the entry of moisture within the handpiece.Improper handing related to cleaning or sterilization of the unit most likely allowed moisture to enter the handpiece.In addition, improper handling likely caused the lack of calibration of the device.No information was obtained regarding customer's cleaning or sterilization practices; however, improper sterilization could have caused the corrosion on the motor.The device was serviced and returned to the customer.
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