UP #4466 Sold? - Trains Magazine

I have nothing concrete, but CSRM has done some swapping with PLA to get more SP steam-era equipment that has direct ties to the Sacramento General Shops.  That effort has resulted in the long-term loan of SP Pacific No. 2467 and Central Pacific suburban-type 2-6-2T No. 233, both of which had been removed by PLA from a city park in Oakland, CA under agreement with the City of Oakland.  The 2467 was made operable by the PLA; the 2-6-2T remains a hulk (it was built at Sacramento Shops in the 1870s).  The 2467 was rebuilt in the late 1920s at Ogden, UT by SP using new cylinder castings and other components made in the Sacramento Shops and steel foundry (the former "Unit Shop").

PLA also has Sacramento-built SP 0-6-0 No.1269, which was a guest engine operated on CSRM's Sacramento Southern in the 1980s before UP donated the 4466.  After 4466 arrived and was put in service, the 1269 went back to PLA, but perhaps it is now being reconsidered as part of a trade. 

The 4466 is and always has been a coal burner, and that has presented problems to CSRM; it also now needs some boiler work to have its FRA permit renewed. When it ran on Sacramento Southern, it tended to spark grass fires and Old Sacramento merchants on the west side of the district were often none too happy about its acrid exhaust.  Since it never historically ran outside of Wyoming, perhaps CSRM has found that it can have a better home elsewhere.

Again, I don't know the latest scuttlebutt, but this may shed some light on the topic.