Investigation summary: since no samples displaying the condition reported are available for examination, we were unable to fully investigate this incident.No root cause can be determined as no samples were received.A device history record review was completed with zero defects found.No quality notifications were written for this batch, nor for the associated assembly batches.Investigation conclusion: this is the third complaint for the lot# 8261706 for the same defect or symptom.Previous complaints: (b)(4).There was no documentation of issues for the complaint of batch 8261706 during this production run.Root cause description: undetermined.
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