Device evaluation: upon completion of the investigation, it was noted that the customer¿s complaint was verified.Some oxidation was observed on flutes drill body and inner drill.Root cause to the oxidation is unknown however, this most likely occurred out on the field.All perforators are visually inspected 100% during the in-process assembly.A review of the device history records (dhr) for this lot (bj023s) show that all test and inspections, including visual inspection, met specification requirements.The device history records (perforator assembly) shows that all tests and inspections, including visual inspection, met specification requirements.The customer's perforator met functional test acceptance requirements; proper engagement and disengagement was achieved with every drilled hole.There was no erratic or poor cutting action.Based on the results of this investigation no further action is required.Trends will be monitored for this and similar complaints.At the present time this complaint is closed.
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