(b)(4).(b)(6).The device was returned for service; however, did not meet manufacturing specifications during pre-repair assessment.Reliability engineering evaluated the device and the reported condition was confirmed.The assignable root cause was determined to be due to improper maintenance, which is user error/misuse/abuse.If additional information should become available, a supplemental medwatch report will be submitted accordingly.
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It was reported by (b)(6) that the handpiece device was not working.During service and evaluation, it was observed that the handpiece device motor seized, jammed, and was heavy moving.It was noted that there was very thick and hard debris of blood and bone particles found inside which was causing a heat problem, and damaged the gear assembly.It was also noted that the device failed pre-repair diagnostic tests for general condition, trigger and ecu function, and power at the motor with test bench.This event did not occur during surgery.There was no patient involvement.There were no reports of injuries, medical intervention or prolonged hospitalization.The exact date of this event was unknown.All available information has been disclosed.If additional information should become available, a supplemental medwatch report will be submitted accordingly.
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