All About The Phase III. AMTK 145 (P42DC) and AMTK 822 (P40DC) lead an Amtrak Inspection train through Cimarron, Kansas on August 4, 2016. Amtrak President Joseph Boardman and other executives were traveling the route of the Southwest Chief the day to thank a variety of local, state, and federal officials for their successful efforts to fund the route of the Chief. Both units were painted into the Phase III scheme for the railroad's 40th Anniversary in 2011.