Investigation: a device history review was conducted for lot number 7356283.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.According to previous investigations, through a variance in the autoline's swage pressure it is possible for the machine to apply excess force to the device during assembly, allowing for the resulting crack to form in the device.Currently, we are conducting a long term study, capa#599768 to determine the root cause for this event, but we are further optimizing our swaging process by reducing depth requirements.
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