Jan 9, 2009:
One firefighter was killed and another was seriously injured when a Boston Fire Department ladder truck hurtled down a hill and crashed into a building Friday on Huntington Avenue in the city's Mission Hill neighborhood, city and fire officials said. Three children were taken to the hospital with minor injuries when the truck hit the room where they were participating in an after-school program.
Fire Lieutenant Kevin M. Kelley, 52, of Quincy, a 30-year veteran of the force, was killed in the crash, said Steve MacDonald, a fire department spokesman.
The truck was carrying Kelley and three other firefighters back from a routine medical call when it went down Parker Hill Road, rumbled through the intersection with Huntington Avenue, smashed into two parked cars, and struck the building, said MacDonald. Kelley was riding in the front passenger seat when the truck rammed the building at 835 Huntington Ave. at around 2:32 p.m.
...
It has since been determined that the truck's brakes failed.
http://www.boston.com/news/local/breaking_news/2009/01/fire_engine_cra.html?p1=Well_MostPop_Emailed3