| UP 5694 idles on the engine track at the yard in Tucson. 5694 was built in the early 2000s as an AC44CWCTE, UP's designation for an AC4400CW equipped with ontrolled Tractive Effort (CTE). This software system limits the tractive effort of the AC4400s to the tractive effort of their predecessors, the Dash-9 series. Behind 5694 is an SD70M, the 3841. |