(b)(4).The homechoice (hc) device was returned and evaluated by the product analysis lab (pal).An event history review was conducted and there were no keystrokes, programming, or use related events that indicated and/or contributed to the problem.The external and internal inspection was performed with no issues noted.Temperature was within specifications.The device passed electrical testing.A volumetric accuracy test was performed and the device failed.Test article, piston foam, was installed and the device passed the volumetric accuracy test.The evaluation revealed the cause of the failure to be deteriorated piston foam.The piston foam was to be scrapped and the device was sent for servicing.A capa was reference to investigate this event.Should additional relevant information become available, a follow-up report will be submitted.
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