When Amtrak 4, the eastbound Southwest Chief developed running gear problems on the second unit P42DC, BNSF 1770, an SD40-2 was put on in Albuquerque. After hearing that it would lead the train, we went trackside to Bernalillo to catch the action.
This engine was built in 1978 as ATSF 5210 and has been a workhorse in the Belen-Albuquerque for some time.