The device was not returned to the manufacturer for physical evaluation, therefore the failure mode cannot be confirmed.Dhr reviewed for s-855 shows no abnormalities relate to reported incident found nor where there any variances, mrr¿s or reworks associated with this serial numbers.Dhr provided by oem shows no evidence of service history on file.Excess time in service.Sampling plan reviewed and is acceptable.As the instrument was not returned for examination, no definitive root cause could be determined.If the device will be returned at a later date this complaint will be reopened and an analysis will be performed.
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