The Twin Comanche got annual'd this last month. While not technically part of the museum's collection, it's nice to have a full-IFR twin at the ready to support the museum's activities. Most museum aircraft are VFR-only and become giant, metric paperweights when they fall ill at an airshow far from home (try finding a local mechanic who can debug a tach generator problem on a Soviet turbine engine when you need one!)
Over the years the TwinCo has been purposed to rush forgotten equipment out into the field, to rescue crew that couldn't make it back from an airshow due to weather or equipment, and to take a quick trip to see people or parts on short notice.
Here Bill is seen making sure that everything is in perfect running order.