The complaint device was returned for evaluation.Incoming visual inspection found light scratches on the case.Technical visual inspection found no anomalies.Device evaluation found that the air inlet threads were broken.The device was calibrated.The alarm calibration, inlet check valve leak test, outlet flow test, and final visual inspection were all tested and passed.The root cause for the confirmed reported event was determined to the alarm fastener.Based on device condition, it has been determined that the device has been dropped and tampered with.This type of event will continue to be monitored.
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