Investigation summary: as no physical samples or picture samples were provided for evaluation, a returned sample investigation could not be completed.Retained samples of the reported protector (lot: 1703017) were obtained for evaluation from our manufacturing facility.Upon visual inspection of the retained samples, no defects were observed.The retained samples were then assembled for functionality testing and leakage did not occur.A device history record review did not reveal any non-conformances during the production of the provided lot number that could have contributed to the reported defect of leakage.During the manufacturing assembly process, inspections are performed to detect defective product.Protector housing were manufactured by (b)(4) supplier.Currently, they are molded in bd (b)(4) plant.Visual inspections and critical dimensions for protector housing parts are performed according to current procedure.During assembly process, the operator performs the following inspections and tests according to current procedure: it is verified that expansion film of the bladder is centered in the protector housing, correctly sealed and free of holes or damages.Visual inspection of the filter is performed to verify that is centered in the protector cavity, welded in a right position and free of holes between the filter and filter cover.Overpressure test is performed to verify that the expansion film of the bladder can resist certain pressure.Film breakage test: the expansion film of the bladder must break at minimum pressure (0,8 bar).It is verify if the break is produced in the sealing area of the film or between the protector and the film.Functionality test is performed to ensure properly work of the protector.Hydrophobic filter leakage is performed to verify that no leaks are present in the filter.For all manufactured lot, leak test is performed according to procedure to confirm that no leaks appear on the membranes.The root cause cannot be established.It was determined that no capa is required.
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