Qn#(b)(4).The sample was returned for evaluation.A visual inspection was performed to determine if the sample had sustained any abuse/misuse/ damage.The cushion of the face mask was completely deflated due to a chip in the hard plastic mask itself which compromised the air tight seal at the cushion and the mask.Based on the investigation performed, the reported complaint was confirmed.The plastic face mask was subjected to some kind of force great enough to chip the hard plastic, which in turn caused the leakage.This defect appears as though it could be the result of improper storage, mishandling, or abuse; however, the root cause could not be determined.There is no evidence that points to a manufacturing/assembly process issue.
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