It's not like they can buy any old engine and slap it under the wing. The two engine choices are deeply integrated in the final package. Boeing has been collabo

It's not like they can buy any old engine and slap it under the wing. The two engine choices are deeply integrated in the final package. Boeing has been collaborating with R-R and GE for years on software and hardware integration. The engines are also mounted to the air-frame at Boeing's facilities (since the plane can't really leave under its own power until that happens), so whether the airline pays Boeing or R-R for the engine is just an administrative detail. As for the server comparison, if you buy a Dell computer, your warranty is from Dell. If something needs to be fixed, Dell will do it and then argue with Intel about who foots the final bill. The airplane world is a lot more complex, and that is exactly my point – the blame is not 100% with R-R and 0% with Boeing – or vice versa. There's plenty of blame to go around.