The perforator was returned for evaluation: dhr - there is no indication that the production process may have contributed to this complaint.All test results passed procedural specifications.Failure analysis - visual inspection utilizing unaided eye performed.Unit was heavily soiled with organic material and had a destroyed eo label.Spring test attempted, unit had a frozen inner/outer drill likely from organic material present.The unit had debris removed, then passed the spring test and functioned as designed.Functional test performed, unit successfully drilled 5 holes and was found to function as intended.Unit was found to meet all acceptance criteria.Therefore, the complaint condition could not be confirmed.Root cause - the root cause is undetermined and was unable to be confirmed in the complaint evaluation.
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