The system manufacturing device history record (dhr) was reviewed.Based on assessment, the product met specifications at the time of release.The company service representative examined the system and was unable to confirm or replicate any system nonconformity, which may have contributed to the reported event.The system was then tested and met all product specifications.The system was found to meet specifications; therefore, the root cause of the reported event cannot be determined conclusively.The manufacturer internal reference number is: (b)(4).
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