On 12/1/16 integra investigation completed.Method: failure analysis, device history evaluation.Results: failure analysis - both units received have rough threads on the post bolt that will need to be retapped.Both units also have bent handles on the post clamp subassemblies allowing the clamps to rotate when in the locked position.General maintenance needed.Device history evaluation - device history record reviewed for this product id show no abnormalities related to the reported failure.Passed all required inspection points with no associated mrr¿s, variances or rework.No service history is on file for this device.Conclusion: in summary the end users reason for return was verified.
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