A visual, functional and dimensional inspection of the product involved in the complaint could not be conducted since the product was not returned.The device history record (dhr) of batch number (b)(4) has been reviewed and no discrepancies were found related to this complaint.No non conformance reports were originated for the lot in question that can be associated to the complaint reported.The dhr shows that the product was assembled & inspected according to our specifications.No corrective action can be established since the sample is not available to perform an investigation and determine the source of defect reported.This customer complaint cannot be confirmed based only on the information provided, to perform an investigation and determine the source of defect reported it is necessary to evaluate the sample involved in this complaint.An attempt to duplicate the failure mode was made but at the time there is no inventory of the involved product code available at the facility nor is it being manufactured at the time.If device sample becomes available at a later date this complaint will be re-opened.
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