I wasn't talking about JIT. If you look, you will see that there are multiple global networks/support depots for the F-35 and the F135 engines (and other systems). In the case of the engines, they are also proving to be extremely reliable in service so the need for spare engines is far less than with previous platforms.
Moreover, if you look at some of the F-35 buys, you will see that what the Romanians are seeking aren't that different to others are doing:
- Poland - 32 aircraft plus 1 spare engine
- Belgium - 34 aircraft plus 4 spare engines
- Finland - 64 aircraft plus 2 spare engines
- Switzerland - 40 aircraft plus 6 spare engines
- Czech Republic - 24 aircraft plus 1 spare engine
- Germany - 35 aircraft plus 2 spare engines