The reported event was confirmed through evaluation and archive data review of the autopulse platform (sn (b)(4)).The root cause is due to a defective load cell.Visual inspection was performed and observed a damaged top cover.The physical damage found during visual inspection is not related to the reported event.The archive data was reviewed and contained user advisory (ua) 02 (compression tracking error) on (b)(6) 2018 confirming the reported event.In addition ua45 shaft not at "home" position occurred.The lifeband straps were not pulled completely out prior to turning the device on.) error message also occurred on the reported event date which is not related to the reported event.Upon evaluation of the platform, load characterization check was performed and identified a defective load cell.Further functional testing was performed by replacing a good known load cell, this cleared the ua2 error message; however, the platform displayed a ua 27 (drive shaft turning too fast during compression) error message occurred within 5-10 compression, this is due to defective gearbox and not related to the reported event.The autopulse platform is a reusable device and was manufactured on 24 mar 2011.Historical complaints were reviewed for service information related to the reported complaint and there was no previous history of complaints reported for autopulse platform serial number (b)(4).
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