(b)(4).A device history record review was performed with a potentially relevant finding.For material #(b)(4).(flat filter), lot # 23p17e0431, according to incoming inspection records, the rotating collar popped off 3 of 315 units in a batch of 15,000.This is outside of the parameter for this defect.A corrective action is not required at this time as the root cause for this complaint investigation could not be determined based upon the information provided and without the actual sample.Complaint verification testing could not be performed as no sample was provided for analysis.A device history record review was performed with a potentially relevant finding on the filter.However, the potential cause of this complaint could not be determined based upon the information provided and without the sample.
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