(b)(4) manufactures the s5 system.The incident occurred in (b)(6).This medwatch report is filed on behalf of (b)(4).(b)(4) requested that the dc/dc-module be returned for further investigation.The unit was received for inspection and analysis; according to inspector the reported issue could be reproduced, but no deviations could be found during the visual inspection, the functional testing and the hardware analysis.The inspector noted that it is very likely that there is a sporadic problem with one of the dc/dc-converters.The dc/dc-module was scrapped for safety reason.A review of the dhr did not identify any deviations or nonconformities relevant to the issue.As there is no trend for this kind of issue no corrective action is necessary; (b)(4) will continue to monitor the market for trends related to this type of issue.
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