If we say the start is in 2006, that should expire at some point in 2021ish.
Maybe the dude (now living in Colorado since 2017) that owns it knows this?
http://www.scpc2.com/boiler.html
Maintenance man Wrote:
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> 15 year lease. But when is the loco due for its
> 1472 day major inspection, retubing and so on?