JFI the engine failure (GE90-85b) was a second stage hp turbine blade that failed approx. half span, that in turn took out the adjacent blade at the disc, the resultant debris wrecking the lp turbine. The smoke in the cabin was caused by the failure of the no2 bearing (front of the hp comp!) labrynth seal (by vibration?)which allowed the oil to be ingested into the compressor.
The first 'realtime' triple 7 evacuation hence the added interest of the authorities.