Investigation summary: a sample was provided for the purpose of aiding in our quality engineer's investigation.Although, leakage testing could not identify the point of leakage in the returned device, it was found that similar situations were caused by a worn component in the manufacturing machinery failing to properly connect the valve housing with the tubing of the device.The worn component was replaced to prevent the reoccurrence of this event.A device history review was conducted for lot number 8037509, our records show it was manufactured february 2, 2018, and determined that this is the only instance of either air bubbles or leakage occurring in this lot.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 of packaged goods.Investigation conclusion: based on investigation results to date, root cause was associated to a bad tubing assembly by station 5 of equipment vh59.The team implemented corrective actions to prevent reoccurrence.
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