During device evaluation and servicing of the autopulse platform (sn (b)(6), the platform failed initial functional testing due to a damaged integrated encoder gearbox and shaft lock plunger.Internal functional inspection revealed that the drivetrain motor was not disengaging, causing constant pressure on the clutch and integrated encoder gearbox.This damaged multiple components, including the integrated encoder gearbox, shaft lock plunger, monolithic plunger, belt clip retainer, and a stuck clutch.All the damaged parts were replaced to resolve the noted issues.The customer's initial request was to have the autopulse platform serviced for a broken clip connecting to the lifeband.This was verified during a visual-functional inspection.The slot on the bottom cover of the platform, to which the lifeband cover plate locking tab gets snapped, was observed to be broken.This did not affect the functionality of the autopulse platform.Further visual inspection revealed several more physical damages, unrelated to the noted failed functional testing.Based on the photos provided by the zoll service team, a vertical crack was going through one of the screw fittings of the front enclosure.One of the head restraint wires was cut in the middle, but it did not render the autopulse platform non-functional.All the observed physical damages were attributed to user mishandling.The top cover, front, and bottom enclosures have been replaced at zoll several times.They were replaced again to address the observed physical damages.Following service, a brake gap inspection was performed and verified the brake gap was within the specification.The autopulse platform was subjected to a final run-in test using the 95% large resuscitation test fixture (lrtf) with known good test batteries until discharged without fault or error.Historical complaints were reviewed for service information related to the reported complaint, and there were no similar complaints reported for the autopulse platform with serial number (b)(6).
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