Originally Posted by
JPJP
I assume that the GEnx-1B from the 787 is out due to the lack of a bleed air system etc.? Then it becomes a massive undertaking to convert a 76-4 pneumatic system, electrical system etc. into a suitable configuration ?
They can simply start with the GEnx-2B67 that is on the 748. Those are at 67,400 lb thrust, so they could derate them appropriately if necessary. A 25% derate would put the thrust ~50,550 lb.
FWIW, the 764 cockpit is virtually identical to the 744 cockpit, so a 764 would provide an easy upgrade to the 744 or 748 for those operators.