EMD AEM-7

The EMD AEM-7 is a twin-cab four-axle B-B 7,000 hp (5.2 MW) electric locomotive manufactured by Electro-Motive Division (EMD) and ASEA between 1978 and 1988. It is a derivative of the Swedish SJ Rc4 designed for passenger service in the United States. Amtrak purchased 54 for use on the Northeast Corridor and Keystone Corridor while commuter operators MARC and SEPTA purchased four and seven for a combined total of 65. Amtrak ordered the AEM-7 after the failure of the GE E60 locomotive. The first locomotives entered service in 1980 and were an immediate success, ending a decade of uncertainty on the Northeast Corridor. In the late 1990s, Amtrak rebuilt 29 of its locomotives from DC to AC traction. The locomotives continued operating through the arrival of the final Siemens ACS-64 in June 2016. MARC retired its fleet in April 2017 in favor of Siemens Chargers, and SEPTA retired all seven of its AEM-7s in November 2018 in favor of ACS-64s.