I hope this doesn't actually happen! However some cool stuff like re-engine option for more modern engines on older aircraft or Boeings Sky interior would be cool!
I am unable to replace some of my 737-300/400 aircraft with 737-NG's. When I go to the 'change aircraft' button on the -300/400, no aircraft come up. Bu if I was to go to 'open new route' using the same city pairs, it will allow me to open a new route using the NG's. The new aircraft are not assigned to any routes and are completly free, and the routes are between major airports. Any help?