Norfolk Southern train defect detector - GIF

Norfolk Southern train defect detector.

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Hmmm...
"Following the Norfolk Southern derailment in East Palestine, Ohio, investigations by the NTSB revealed significant issues regarding the railroad's use of "hot box" detectors (trackside sensors that detect overheating bearings).
Key details regarding this investigation include:
Detector Failure to Signal: The train passed three hot box detectors before the derailment, but the system did not trigger an alarm soon enough to stop the train, despite a bearing being 103 degrees hotter than the outside temperature.
Threshold Standards: Norfolk Southern's standards at the time did not require a stop and inspection unless the bearing temperature reached 170 degrees or higher, even if the temperature was rapidly increasing..."