Investigation summary: a device history record review was completed by our quality engineer team for provided lot number 9184190.The review did not reveal any detected abnormalities during the production process that could have contributed to this defect and all quality tests were found to be within specification.As a sample was unavailable for return, a thorough sample investigation could not be completed.Based on the investigation results, an exact cause for this incident could not be identified.There are quality controls currently in place to detect this type of defect during the production process.Further action has not been determined necessary at this time.Our quality team will continue to monitor the manufacturing process for this defect and other emerging trends.Investigation conclusion: bd was not able to confirm the customer¿s indicated failure mode.Bd was not able to duplicate the failure mode in the manufacturing process.The maintenance records were reviewed and during the manufacture of this lot no adjustments were performed that contributes to this failure mode.Quality records have been consulted for tracking and trending purposes but issues like this are not detected which means pretty low occurrence.We will keep monitoring the manufacturing process and in case any emerging trend is detected, further actions will be taken if necessary.Process fmea rm5785 and eura eurap2053001 were reviewed and there are proper controls in place to detect product malfunctions.Root cause description: based on investigation results to date, root cause for manufacturing process cannot be determined.Rationale: based on an evaluation of severity and frequency it was determined that no corrective action is required at this time also the root cause was not identified, therefore, corrective and preventive actions were not implemented.
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