CHICAGO SUN-TIMES
Tracks suspected in CTA accident
Federal safety investigators said Tuesday's CTA train derailment could have been caused by rails that were farther apart than they should have been.
Since Wednesday, the National Transportation Safety Board has been trying to pinpoint why the last car of an eight-car Blue Line train jumped the track inside a subway tunnel just west of the Clark and Lake station. A definitive answer to that question may be a year away, but Friday's inspection of the track put a new focus on the investigation.
According to standards set by the CTA, the distance from one rail to the other should fall between 56.5 inches and 57.5 inches.
But in a few locations within feet of the accident site, this distance -- known as the track's tolerance -- was wider by more than an inch in some cases, the NTSB found.
"That doesn't seem like a lot, but that is enough to cause the car to derail," NTSB member Kitty Higgins said. "The eighth car left the track because the rails were farther apart than they were supposed to be."
Higgins said the track alignment problems existed before the derailment, not as a result of it.
Wear and tear from trains can cause rails to spread apart, NTSB investigator Mike Flanigon said.
The tracks are supposed to be inspected and measured twice a week, and the last inspection was last Friday, four days before the accident, the NTSB said.
However, no details were available on what problems, if any, that inspection or previous ones turned up.
The NTSB's planned review of track maintenance and inspection records may raise larger questions about how thorough CTA system inspections are and how quickly problems are repaired.
The CTA could not address any of those questions Friday because of the ongoing investigation, a spokeswoman said.
Smoke and sparks, no flames
Flanigon said the Blue Line track that was out of alignment was fixed shortly after the accident.
The NTSB's 11-member team from Chicago, Washington and Los Angeles had already established that there were no significant problems with the train itself.
The train's motorman -- whose second day working the Blue Line was Tuesday -- passed his drug and alcohol screenings, Higgins said Friday.
Without an event recorder on the train, it will be difficult for the NTSB to determine how fast the train was going, but the motorman told investigators he was traveling approximately 20 mph in a 25 mph zone.
Initial reports from the CTA and train passengers indicated that a fire broke out under the eighth car after the derailment. But Friday, the NTSB said there were only smoke and sparks, no flames.
More than 150 people were hospitalized, most with smoke inhalation. One person remained in critical condition at Northwestern Memorial Hospital on Friday.
The NTSB plans to wrap up its on-site investigation this weekend. As part of its focus on track conditions, the agency will be looking at the rail-fastening components to determine what may have caused the tracks to come out of alignment, Higgins said.
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