The autopulse platform (s/n (b)(4)) was returned to the manufacturer for evaluation.Visual inspection was performed and the customer's reported complaint was confirmed during visual inspection.The platform was run for 15 minutes using an lrtf (large resuscitation test fixture) equivalent to a 250 pound patient with no problems encountered.Archive data showed that multiple user advisory 18 (max take-up revolutions exceeded) codes occurred on the reported event date of (b)(6) 2014.There were no mechanical issues observed with the platform during evaluation that could may have caused or contributed to the observed ua 18 codes.Based on the archive data, the code occurred as expected, due to no load being placed on the platform while it was in operation.Based on the investigation, the part identified for replacement was the channel die cast assembly.In summary, the reported complaint was confirmed during visual inspection and was attributed to the platform channel die cast assembly being wider than intended.Unrelated to the reported event, the archive showed that multiple ua 18 codes occurred on the reported event date.The cause was identified as no load placed on platform while it was in operation.
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