I know a passenger on this flight, AF 442 CDG to GIG. There wasn't anything too dramatic. Nothing to suggest explosion or fire, although the Brazilian press reported this. Later on, one of the cabin crew said that the fire extinguishers had been activated(?). Some very strong vibrations and there were a few odd noises. After a few minutes, the engine was shut down. Speed dropped from c 580mph to 400mph, and altitude fell from 35000 to about 22000. After that it was fairly smooth flying for about 2 hours over the Atlantic to Fortaleza. Landing was perfect. No signs of emergency crews.
In a seprarate incident a couple of weeks ago, a British Airways 777 en route from Heathrow to Chicago was diverted to Dublin with reported engine failure.