GE is responsible for the engine - the problem is fan to cowl clearance, an engineering screw up as the information states that fuel efficiency will not be reduced - adequate blade tip clearance with the front edge insufficient. Engine installation - is that a Boeing task (I refer to the cowling design) or is that part of the engine package and totally GE's design? I presume increasing the clearance by grinding involves more than a crew of mechanics with Dremel grinders, which would really be cool watching from the window of your flight as you have loaded first in First Class and are able to look back at mechanics making the final touches before your plane is pushed back.