Originally Posted by
Rhino power
From Aviation Week:
The JAS-39C to E conversion sounds a little more comprehensive than a simple 'upgrade' though, '(new) primary structure' sounds like quite a significant part of the airframe will be a new design and build...
-RP
Well, follow the upgrade cycle of F15 or Tornado or Harrier etc and it seems fairly standard. The cost is as substantial as the upgrade.