(b)(4).The homechoice (hc) device was returned and evaluated by the product analysis lab (pal).The event history log review showed no keystrokes, programming, or use related events that indicated and/or contributed to the reported issue.A review of the device history records revealed no issues that could have caused or contributed to the reported difficulty.The external/internal inspection was performed and the device passed, along with all of the electrical testing.The fluid volumetric accuracy test that was performed, had failed with the original piston foam.However, when a test article, piston foam, was installed, the device passed the accuracy confirmation testing.The original piston foam was removed and inspection revealed a cracked door piston and a deteriorated piston foam.The evaluation concluded that the cause of the failed fluid volume accuracy testing was the deteriorated piston foam and a cracked door piston.The piston foam and the door piston were to be scrapped.This issue is being further investigated through a capa.Should additional relevant information become available, a follow-up report will be submitted.
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