Prior to ordering their 200+ P42DCs to replace their F40PH fleet at the end of the 1990s and early 2000s, Amtrak first ordered 44 P40DCs from GE in 1993. These ended up spending several years in storage before being upgraded to P42DCs. They do retain their original P40DC numbers, however, which is why this unit wears 817 instead of a number between 1 and 207 as its "true" P42DC cousins do.
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