A SD70ACU is a cheaper rebuild than a SD70ACC rebuild. So if they had no interest in the SD70ACU concept or the economic downturn and PSR scuttled any plans that may have been considered for their remaining SD9043MAC's, I personally doubt they have any plans for a major DC-to-AC rebuild of a portion of their SD70M fleet.
Within the last few days the UP has begun putting most or all of the EMD Tier 4 locomotives into service. The line of stored Tier 4 locomotives near Sidney, NE has been cleared out. Also many of the early GE AC4400CWs have joined the storage lines. There is a large amount of stored locomotives parked in the former Neff Yard in Kansas City estimated at several hundred locomotives, mainly SD70M and AC4400CWs, but including a smattering of other models.
The amount of GE AC locomotives being rebuilt at this time amounts to just a few per month.
UP has sold the remaining SD90MACs (4300hp) to Progress Rail.
With UP already sending their AC44s through GEs rebuilding program, and the the new Tier 4 EMDs being problematic, would they have any interest in having the large fleet of SD70Ms rebuilt into AC units similar to what NS is doing?
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