No can do
The GEnx-2B on the 747 is a redesign of the -1B on the 787, and can not be interchanged.
It's not just the fact it has cabin bleed, the fan diameter is smaller, the booster and LPT are shorter. It is a smaller diameter, shorter, lighter version that has reduced thrust capability.
Not sure if the core (HP system) is even common, the bleed capability may mean the engine casings are not the same, so perhaps no R/O shop advantage either.
Last edited by Iceman2; 23rd March 2011 at 13:29.
Reason: Mistake