• Blue Line derailment outside Arlington Cemetery 10/12/21

  • Discussion related to DC area passenger rail services from Northern Virginia to Baltimore, MD. Includes Light Rail and Baltimore Subway.
Discussion related to DC area passenger rail services from Northern Virginia to Baltimore, MD. Includes Light Rail and Baltimore Subway.

Moderators: mtuandrew, therock, Robert Paniagua

  by Mike Doughney
 
A Metro train partially derailed on the Blue Line near the Arlington Cemetery station Tuesday evening, and firefighters are working to get hundreds of passengers out of the tunnel, Metro and fire officials said.

Metro got word of a disabled train in the tunnel between the Rosslyn and Arlington Cemetery stations just before 5 p.m. A Metro worker then discovered the train partially derailed, according to Metro.
https://www.nbcwashington.com/news/loca ... wSFPCbdGzU
  by STrRedWolf
 
WJLA (ABC affiliate DC) report: https://wjla.com/news/local/train-derai ... ggy-bottom

WTOP (radio) report: https://wtop.com/dc-transit/2021/10/blu ... -stations/
Initially, there were no reported injuries, but Arlington Fire and EMS said around 8 p.m. Tuesday that one person was taken from the scene to a hospital in “stable condition.”
Blue is basically Yellow today and Arlington Cemetary is bus bridged between Roslyn and Pentagon.
  by west point
 
"IF" a switch caused the problem it could have been the switch point did not close all the way ? Unlikely unless maintenance neglect. Or it could have been a frog problem ? But let us just wait for NTSB preliminary.
  by Sand Box John
 
YOLO
https://www.wmata.com/about/news/Metror ... 4-2021.cfm

wonder if they think the switch contributed to the derailment


One of the posts made by Rail Transit OPS mentioned collecting an object that may have been a from one of the cars found in the vicinity of the switch.
  by Sand Box John
 
kitchin
https://www.washingtonpost.com/transpor ... ment-ntsb/
Stuck holding brake reported by the operator, via radio, coming out of Rosslyn. Expert at the end of the article says that wouldn't normally cause a derailment.


"Holding brakes" don't magically set all by themselves. How the hell did the operator get all the way to Rosslyn from Largo with out noticing any out of normal performance of his train.
  by kitchin
 
Re-reading the article, the brake was only reported stuck on one car, #7200. The radio recording is at http://openmhz.com/

More quotes from experts:

“Depending on the track-train dynamics, such a thing could cause a derailment.”

“When it’s unoccupied, that’s when they put those handbrakes on. But that should have been checked before the train ever left.”
  by srepetsk
 
Sand Box John wrote: Thu Oct 14, 2021 9:54 pm "Holding brakes" don't magically set all by themselves. How the hell did the operator get all the way to Rosslyn from Largo with out noticing any out of normal performance of his train.
The 7Ks are unlike prior series and holding brakes apply and disengage every time a train is keyed down or keyed up. WMATA, WMSC, and NTSB would need to look at the underlying cause of the brake fault warning, which itself isn't a cause. There could have been a software issue that triggered the warning, for example.