rom the NTSB investigative update as posted here by fokkerjet
Quote:
...
• Initial examination of the left engine revealed multiple breaches of the engine case in the area around the high pressure compressor.
• Examination of the material recovered from runway found several pieces of the high pressure compressor spool (approximately 7-8 inches in length).
...
Here is a link to a detailed diagram of a GE90. The variant is the 115, so some details and proportions will differ from the accident flight. But nonprofessionals unfamiliar with basic turbofan structure designations may find it helpful.
http://lyle.smu.edu/propulsion/Pages.../turbofan2.jpe
As lomapaseo suggested above, I think the biggest outstanding question is how this failure resulted in the release of so much fuel.
I'm mildly curious how the pieces ended up on the runway. They may not have even made it through the nacelle but only got as far as the bypass and gone out the fan discharge.
Nevertheless any unmitigated source of fuel inside the nacel or pylon may have to be looked for by the fire-safety group.
Without the fire this may not have been a biggie