Date of event: unknown.The date received by manufacturer has been used for this field.A sample is available for evaluation but has not yet been received.However, the manufacturing site in (b)(4) has completed a no sample investigation.A review of the device history record revealed no irregularities during the manufacture of the reported lot # 6053177.A manufacturing review revealed no abnormalities with preventative maintenance, calibration, or equipment that could have influenced the customer's reported issue.An absolute root cause cannot yet be determined as the device evaluation on the available sample has nit yet begun.Upon completion of the investigation, a supplemental report will be filed.(b)(4).
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