RE: Monoply in Engines
BA used GE engines for their first 777`s because GE were desparate to get a major airline as both AA and DL chose RR and UA chose P&W which left GE with just Continental in the US so they made BA a deal the maintain all BA`s engines for a set period of time at a knock down price as an insentive. Unfortunately the GE engines suffered early teething problems which delayed BA`s launch. I dont think many customers have chosen GE to power their 777`s most have chosen P&W or RR