When Amtrak first released their Heritage units, AMTK 184 wore the Phase 4 heritage scheme. In 2023, AMTK 184 went to Beech Grove, Amtrak's maintenance facility. When it emerged, it was again wearing the traditional Phase 5 scheme. However, a few months later, AMTK 164 was released, now wearing the Phase 4 heritage scheme. Here, AMTK 164 is second out on the westbound Zephyr.
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