The autopulse platform (s/n (b)(4)) was returned to zoll (b)(6) on 11/16/2015.Investigation results as follows: a visual inspection of the returned autopulse platform was performed and found that the short black cover was damaged.Note this physical damage can occur due to normal wear and tear and/or physical abuse.A review of the archive was performed and user advisory (b)(4) (max motor on time exceeded during active operation) was observed.The platform was functional tested and the autopulse performed both 30:2 and continuous compressions.Load cell characterization was also performed and one of the load cell failed indicating incorrect readings at high loads.The load cell was replaced to remedy the reported complaint of (b)(4).Based on the investigation, one of the load cells was replaced to remedy the reported complaint.In addition, the short black cover was also replaced.In summary, the customer's reported complaint of autopulse displaying (b)(4) was confirmed during archive review and functional testing and was attributed to a defective load cell.After replacement of the parts identified during investigation, the platform passed all final functional testing criteria.
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