The report of the autopulse platform (sn (b)(4)) displaying a system error, out of service, revert to manual cpr message was confirmed during functional testing and archive data review; the root cause was due to the defective drive train motor brake assembly air gap being out of specification.The archive data was reviewed and contained a system error 139 (unable to hold compression position) error message on (b)(6) 2018.Evaluation of the platform during initial power up, revealed a system error, out of service, revert to manual cpr message.This was caused by the drive train motor brake assembly air gap being out of normal range.As part of routine service during testing, the platform was further examined and found user control panel backlight is flickering.This observation is not related to the reported event.Upon customer approval, the lcd and drive train motor will be replaced.The platform will be further tested to full specification.The autopulse platform is a reusable device and was manufactured on 08 jun 2009.It has exceeded its expected service life of 5 years, the device is over 9 years old.Historical complaints were reviewed for service information related to the reported complaint and there was one similar complaint reported for autopulse with serial number (b)(4).Ccr (b)(4), reported on (b)(6) 2013, replaced system processor board to remedy the issue.
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