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 - a visual inspection was performed and observed that the unit was lightly soiled and had a worn label, but no other anomalies.A spring test was performed, and the unit passed as designed.A functional test was performed, the unit successfully drilled 5 holes with no issues and functioned as designed.Unit passed all functional tests.Therefore, the complaint condition could not be confirmed.Root cause remains undetermined.Product was received for analysis and the analyst could not confirm the complaint condition.Possible root cause per the failure analyst ¿user misuse or drill allows to be set incorrectly.¿.
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