Investigation summary: in response to the event reported a device history review was conducted for lot number 0168655.Our records show that this is the only instance of this issue occurring in this production batch.According to the sampling plan applied for product performance, this lot was accepted and released without defects being noted during the final assembly or visual inspections.Unfortunately, a sample could not be obtained for evaluation and testing.Without the ability to investigate the affected unit our quality engineers were unable to determine the root cause for this complaint.We check the retained sample from the complained batch and there is no abnormality.Bd will continue to monitor this issue.
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