A Metro rider is suing the transit agency after being injured more than two years ago when a Red Line elevator dropped suddenly under her, the latest problem the transit agency is facing over its escalators and elevators. Juana Maria Foster, 52, seeks more than $500,000 from the transit agency, according to the lawsuit filed in U.S. District Court in Maryland. She was riding a Forest Glen station elevator on Dec. 31, 2008, when the incident occurred, the lawsuit said.

The Forest Glen Metro station is the deepest of the system’s 86 stations, some 21 stories underground. So unlike the other stations, it doesn’t have escalators. Riders rely on a bank of elevators to get from the street and the train platforms.