This phase refers to the early March 1999 - November 2000 order by UP as Nos. 7138 - 7142. General Description: The GE AC4400CW, sometimes referred to as "AC44CW", is a 4,400 horsepower (3,280 kW) diesel-electric locomotive that was built by GE Transportation Systems between 1993 and 2004. It is similar to the Dash 9-44CW, but uses AC traction motors instead of DC, with a separate inverter per motor.
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