The date received by manufacturer has been used for date of event.Results: a sample is not available for evaluation.As part of a no sample investigation, 25 retention samples were evaluated for safety mechanism failure; 10 units were tested by activation cycle and 15 units were tested by manual triggering.All samples passed testing, reached lock-out position after activation, and did not show any safety device issues.A review of the device history record revealed no irregularities or non-conformances during the manufacture of the reported lot # 5239129.A manufacturing process review showed no issues with spring formation, device assembly, packaging, raw material incoming inspection, in process inspection (100% automated primary function test, controlled trigger test, activation cycle test), or final inspection.Conclusion: without a sample, an absolute root cause for this incident cannot be determined.No issues were observed with retention sample testing or found within the device history record and manufacturing process reviews.(b)(4).
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