Device history record (dhr) review confirmed that companion 2 driver s/n (b)(6) was serviced and passed all functional testing prior to being released to finished goods.Alarm history and patient data file review found no new alarms, however, there is not a specific alarm for inability to recognize wall air.If driver recognized wall air, an indicator would be found in in patient data file but no indicator was found.Visual inspection of external components found no abnormalities.Visual inspection of internal components found damaged capacitor in power management board, unrelated to customer complaint.Companion driver did not pass incoming inspection due to driver not recognizing wall air.Additional testing was performed and complaint confirmed to be cause by an internal pressure regulator.Companion 2 driver passed all functional testing with alternate regulator installed.Failure investigation confirmed complaint upon incoming inspection.Root cause determined inspection failure due to a malfunctioning internal pressure regulator.Failure investigation identified damage to the capacitor in the power management board, however, it is unrelated to complaint.Device was not in use by patient at time of complaint.This issue will be monitored and trended as part of the customer complaint process.Syncardia has completed its evaluation and is closing this file.
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