#BREAKING: CTA Red Line train comes uncoupled between the Wilson and Sheridan stations with ~300 people on board, just before 3pm. One person on CTA radio alleges "someone tampered with the knuckle" and requests a photo taken immediately. #ChicagoScanner

The "knuckle" is the coupler between two train cars: Photo:

The second (car # 5598) and third (car # 5709) railcars became uncoupled from each other. The first part of the train has made it to Sheridan to unload customers, and the second part is about to arrive. #ChicagoScanner

CFD transported one person that was on the incident train to an area hospital, unknown circumstances. The Red Line is back running normally. #ChicagoScanner

Here's a Trib article from 1987 where train uncouplings were a frequent occurrence:

Just so people know if that knuckle is uncoupled and they take a turn, which there are quite a few on the red/brown line, thats an almost guaranteed derailment

thats a senior supervisor, K580,

I always see blacks moving from car to car while trains are in transit. They are never held accountable.

Good close captioning, very accurate

Where did you guys get 300 passengers from? I thought the 300 passengers was the first train they unloaded at Belmont, not the number of people on this stuck train, but I couldve misheard

BC9 said "Okay, according to CTA representative 568 Morgan, they're going to be moving the downed train in two sections to the Sheridan station. Approximately 300 persons on board. The first section that came uncoupled from the second section is the head section, uncoupled from the second and third section. [...]" (AI transcript)