UNION PACIFIC EMD SD70MDC.

[Overmod]

I have it direct from David Goode that the reason NS hasn't bought AC power is because of the investment in DC motors, infrastructure, etc. (it also helps that they have their own, very good, motor shop).

He also mentioned they were keeping an open mind toward future purchase of AC, particularly if the economics (primarily price) improved.

Very little question in my mind that NS shop forces could work effectively on all AC drive components, even after GE's service/maintenance guarantees expired...