https://forums.radioreference.com/threads/possible-detector-failure-prior-to-ohio-derailment.454187/
train got alert from defect detector seconds before emergency brakes activated - per msm report maybe it was the 49.8 detector - looks like maybe 1 or 2 previous detectors missed it -- You received this message because you are subscribed to the Google Groups "massfire" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/massfire/CAFXWwKa%3DMHjF0rt6AbXh761iEB5Tq0rZqso2USS%3DLd31w5efAA%40mail.gmail.com.
