Date of event: unknown.Investigation: investigation summary: review of the dhr revealed all required challenges samples and testing was performed per specification in accordance with the in-process sampling plans.Per review it was noted that there were no reject activity findings throughout the build of this lot that would impact upon the quality of the product.Received one unused iag 14ga unit in sealed package from the lot number 6308948.Visual/microscopic examination: observed there was no mechanical/physical damage to any of the components (spring, needle, hub, or grip) or evidence of adhesive on the button or hub.Functional test (needle retraction) was performed: performed the hub twist test then depressed the button.The retraction was successful, no delayed reaction was observed.The returned unit provided for evaluation met and performed per the required manufacturing specifications.Investigation conclusion: the defect needle retraction failure as stated in the description of the complaint was not confirmed with the returned unit.The returned unit did not display any adverse characteristics that would contribute to the defect the customer experienced.The defect described in the incident report could not be confirmed or replicated with the returned units.The actual unit described in the incident report was not returned for evaluation.The customer experience was not confirmed based on the evaluation and testing that was performed on the returned unit.Reproduction of the customer¿s experience was not achieved with the testing performed on the returned unit.Root cause description: there was no definite physical or mechanical evidence that confirmed and supported manufacturing process related issues for the defect observed in this incident.
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