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| Science & Technology |
| NTSB Releases Initial Findings From East Palestine Train Derailment |
| 2023-02-24 |
| [Townhall] Train 32N was operating with a dynamic brake application as the train passed a wayside defect detector on the east side of Palestine, Ohio, at milepost (MP) 49.81. The wayside defect detector, or hot bearing detector (HBD), transmitted a critical audible alarm message instructing the crew to slow and stop the train to inspect a hot axle. The train engineer increased the dynamic brake application to further slow and stop the train. During this deceleration, an automatic emergency brake application initiated, and train 32N came to a stop. Looks like the bearig was already hot when it got to the detector and the crew responded appropriately. Since the derailment, the NTSB said it has collected the "wheel bearing and affected wheelset" as well as the "vinyl chloride tank car top fittings, including the relief valves." The ongoing NTSB probe will "focus on the wheelset and bearing; tank car design and derailment damage; a review of the accident response, including the venting and burning of the vinyl chloride; railcar design and maintenance procedures and practices; NS use of wayside defect detectors; and NS railcar inspection practices," according to the investigators. I expect the final report will be comprehensive. |
| Posted by:Bobby |
| #1 Maybe accelerometers on each wheel assembly would work. |
| Posted by: Super Hose 2023-02-24 23:17 |