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The aspect getting only partial attention is not the absolute temperature, but the rapid rate of change. By MP 79.9, the consist had been moving for multiple hours. The delta between MP 79.9's temperature of 38°F {above ambient} & MP 69.01/103°F SHOULD have set off alarm bells.

JDC wrote: ↑Tue Feb 28, 2023 3:30 pm it will take up to 36 months at a cost of approximately $55 million to repress all 7K wheels."

ABC news is reporting that NS has refused to join the Confidential Close Call Reporting System (C3RS). It's parallel to the Aviation Safety Reporting System. Both are run by NASA to be separate from the regulatory agencies involved, and provide a way for employees to report safety issues without ret...

NS is told to stop shipping contaminated soil/water until a destination is found.

So it's another Fukushima Daiichi situation: where to put it all?

https://www.livemint.com/Politics/LKbqO ... -leak.html

You could have a case, and I'm not saying this happened, that you could lose com with the DP, then go into emergency, then bottle the air with a kinked brake pipe. which is what happened in the NTSB link I cited above.... There was one other aspect brought up by NTSB. The tankers were placarded, bu...

I've never run DP but presume that when the train line dumps, the DP unit(s) would go to idle. So the DP might be running in idle, but would not be under load, working. Does the engineer have the ability to shut down the DP altogether? The locomotives must have air brakes or they could never stop w...

The DP is controlled via RF link to the lead locomotive. It does not stop when com is lost. It will maintain whatever power or dynamic brake setting, called "load", it was in when comm was lost for a certain amount of time. The only way get around this is to make a reduction of the brake ...

Much has been said about the first two detectors. There are different types of detectors, which function in different ways. You can see the Salem detectors at https://youtu.be/sjuKIV7odSA re: NS statement: “The company’s wayside detectors on its network trigger an alarm at a temperature threshold t...

Train was 2x1 with DPU at position 109 So the DPU was behind the derailment. So it's not just the combined inertia of the rolling stock feeding the jackknifing but also the DPU, correct? Since there's been no mention of same, I assume the DPU was uncrewed. Does the DPU's compressor also pressurize ...

Roscoe P. Coaltrain wrote: ↑Thu Feb 23, 2023 5:54 pm NTSB at the podium

https://www.youtube.com/watch?v=5NN6gjWT7dI

Train 32N passed three HBD systems on its trip before the derailment. At MP 79.9, the suspect bearing from the 23rd car had a recorded temperature of 38°F above ambient temperature. When train 32N passed the next HBD, at MP 69.01, the bearing’s recorded temperature was 103°F above ambient. The thir...

I'd heard a rumor earlier that the EP crew was directed to continue despite the Wayside alert, but did not give it credence at the time, without evidence.

This may sharpen the focus on PSR practices..... Does anyone know if the Sandusky derailment discussed was investigated by NTSB and/or FRA? https://www.propublica.org/article/norfolk-southern-policy-safety-alerts-east-palestine-derailment A Norfolk Southern Policy Lets Officials Order Crews to ignor...

To all the pseudo electrical engineers posting here about "Let's just add power over Ethernet and microprocessors on every rail car... " "It will only be $20 per axle...." I don't recall ever discussing the price per axle. And I'm not a pseudo electrical engineer; I am a real on...

Yup. And the connectors to establish the communication bus down the length of the 100+ car train have to work reliably, not flake out when a little dirt gets in, etc. Yes, you'll need reliable connectors, but that's hardly rocket science. What do the in-use systems in AU, etc use? Start with existi...