I did a lot if research on this for my SOS paper. Nextant aerospace can refurbish the fleet by overhauling everything and replacing engines and avionics. When I spoke with their VP, he talked about how the airframe life limit on a standard Beechjet is unlimited with proper maintenance and that the AF chose to place an hour limit even though the T-1 airframe is beefier than a standard Beechjet, and for good reason. But when you can get a practically new jet with double the fuel economy for about $1M per copy, why would you not do that? The fuel savings alone would pay for it after just a few years of use. Sent from my iPhone using Tapatalk