100 engines are not enough,when each TFX need two engines.Or Turkey only want 50 or enven less TFX fighters?Turkey will finally have to go for a new engines soon or later.This is not important. In that case, we will withdraw about 100 relatively old F-16s from service and use the engines they have. And the thing is, we have the ability to replicate those engines exactly, including the hot zone. Therefore, maintenance will not be a problem. But we don't want to do that. That's why we formally applied to buy the engines.