Originally Posted by
rottenray
I hate when people do this... But is there a source for this?
I haven't heard anything solid about the IP turbine going overspeed - if you have, please share!
Cheers!
I don't think there is an official source - yet, but if any such driven disk becomes disconnected from its load it will accelerate rapidly, and will break sooner or later. The better made, well balanced and strong will fail at a higher speed. So just apply Occam's razor and dismiss this with difficulty - but those specialists with access to the parts found will know for sure.
See the Sioux City DC-10 crash for an example how a fan disk can fail due to old material defects. I wonder if the A380 has hydraulic fuses as recommended in the report of that 20 year old accident?