(b)(4).The sample was returned for evaluation.A visual exam was performed and it was observed that the product was assembled correctly.The manufacturer reports "this issue happen may due to the accumulation of condensation or another device was blocked which connect to this filter.In ifu state that replace unit immediately if there is increasing resistance, if it is soiled with secretion or otherwise obstructed." in the current manufacturing procedure, 100% leak testing and drop test sampling is conducted at the assembly area; thus, any defective product would be detected prior to release.The manufacturing facility also reports that ten pieces of the same catalog number in current production were taken to test the reported defect.All ten pieces passed visual examination and functional testing.Based on the investigation performed, the reported complaint that the filter was blocked could not be confirmed.It was determined that the filter was assembled correctly.
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