The MBTA says it has removed a Red Line subway car from service and is inspecting the doors of similar cars after a rider posted a video online that shows a train traveling through subway tunnels with a door open.
"One of the door's components malfunctioned, causing the door to stay open," T spokesman Joe Pesaturo said in an e-mail Wednesday. "Upon learning of the malfunction, Red Line personnel removed the subway car from service and took it to the maintenance facility for a repair."
The cause of the malfunction is "under investigation," he said. The car was an "older" model.
"With safety being a top priority, the Red Line has developed a new inspection procedure for the older Red Line cars that have this type of mechanism in the door," Pesaturo wrote. "All of the older Red Line cars are being checked."
Pesaturo said the incident happened Monday. Half of the door was stuck open; a customer alerted T staff about it; and no one was injured, he said.
The YouTube video was posted by Quincy resident Erika Myllmaki, who said she was traveling with her boyfriend, Marwan Mostafa on Monday.
She said she got on at Quincy Center on Monday, bound for Andrew Station. She said the doors were open for four full stops.
Pesaturo said there have been no reports of doors being open on other moving T trains or buses.
"It's important to note that the Governor's Transportation Finance Plan provides funding to replace the oldest cars (1969) in the Red Line fleet," Pesaturo added, referring to a plan by Gov. Deval Patrick to invest $1.9 billion in the state's transportation system, which was countered this week by Beacon Hill lawmakers who offered a $500 million transportation investment plan instead.