Ninety-five people were aboard an A Line train that lost power and stalled Thursday morning at an Aurora intersection.
The power outage caused widespread delays on the train between Denver International Airport and Union Station, and prompted RTD to put a bus shuttle in place between the Central Park and DIA stations.
Repairs lasted into the afternoon, and everything went back to normal by the evening.
Aurora Fire says the train lost power between Airport Boulevard and Chambers Road because the control arm that grabs the wire -- called a pantograph -- somehow disconnected.
RTD later shut down power for that section of the train to investigate.
The passengers who were aboard at the time were taken off the train and put on buses, Aurora Fire says.
RTD says Thursday's A Line problems won't impact the waiver process with the Federal Railroad Administration.