torquelink, they now all have trent cores. as for ratings, we are still operating both G's and H's. Both engines are identical, all that changes is a pin programming plug on the FAFC and some wire integration in the main equipment centre (on -400). Oh, and a sticker in the cockpit
its quite easy to switch them back and forth. the only way you'd know is that sticker and the FMC ident page.
hope that helps
