9750's First Revenue Run: HHP-C AMTK 9750 leads its first revenue train from Washington, DC to New York Penn Station after over 2 years of testing and crew training. One day prior, HHP-C AMTK 9751 had its first day in revenue service. On the hind end, providing power to the train, is AMTK 637 (ACS-64). The leader was rebuilt from HHP-8 AMTK 691 in 2023.