(b)(4).The homechoice device was returned and an evaluation was completed.An external/internal inspection was performed and no issues were noted.The homechoice device received a returned instrument testing evaluation (rite).This evaluation included functional and electrical testing of the device.The device passed the electrical test but failed the rite functional test due to volumetric accuracy.Review of the device logs did not verify the reported issue.Upon conclusion of the investigation, the cause of the failure was determined to be deteriorated piston foam and cracked door piston.A service history review was performed and revealed no issues that could have caused or contributed to the reported issue.The piston foam and door piston were scrapped.The device was sent to service.This issue is currently being addressed through a capa.Should additional relevant information become available, a follow-up report will be submitted.
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