At about 12:25 p.m., on September 27, 2002, AirTrain-JFK light rail transit test train No. 121 derailed in a curve on the aerial guideway that runs between the Howard Beach station and the Federal Circle station near JFK International Airport in Jamaica, New York. At the time of the accident, AirTrain No. 121, with three cars and no occupants except the train operator, was participating in a power distribution system test under the authority of the transit system's testing and commissioning supervisor (test supervisor). When the train derailed, large concrete slabs that had been placed in the lead car for added weight shifted and pinned the train operator against the operator's console, severely injuring him. He was transported to a local hospital where he died at 3:05 p.m. on September 27, 2002.