The autopulse platform was returned to zoll (b)(4) for analysis.Investigation results are as follows: visual inspection was performed and no physical damages were observed.A review of the autopulse platform's archive data was performed and no user advisories or warnings were observed on the reported event date of (b)(6) 2015.Functional evaluation of the returned autopulse platform was performed and the customer's reported complaint of the lifeband being loose and falling off the autopulse was not duplicated.Unrelated to the reported complaint, investigation found that the driveshaft was difficult to rotate.The clutch plate was deburred to address this issue.Following deburring of the clutch plate, the platform passed all functional testing.Based on the investigation, no parts were replaced to address the customer's reported complaint.In summary, the customer's reported complaint of the lifeband being loose was not confirmed during functional testing.Unrelated to the customer's reported complaint, it was observed that the driveshaft was difficult to rotate and is attributed to the clutch plate needing to be deburred.Following service, the platform passed all testing criteria.
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