coloradohirailer:
I think at one point in time the Strasburg RR was running a Pennsy steamer (D16sb #1223?) on loan from the Railroad Museum of Pennsylvania (literally across the street). When it reached the point of needing its required service (boiler rebuild), I believe it went back to being a static display at RRMofPA. I'm not certain of that, so if someone else knows, please speak up.
In the late 1980's, K4s #1361 suffered a significant mechanical breakdown while in excursion service. From all reports, that repair / rebuild has been badly mismanaged by the Altoona Railroader's Museum - poor quality work that had to be redone to meet federal regulations, millions of grant $$$ wasted, a total mess. And after 14 years, parts of #1361 are in a static display in Altoona. It's a total screw-up.
Perhaps this topic belongs on the real railroads forum.
It is sad.
George