Bearfoil
Sorry for the delay in response.
My quote: I can't see it happening if the disc moved rearward easily and it is hard envision if the disc moved forward, except for the first 90 degrees of the bending.
Oops! This was poor wording on my part. I should of said: "I can't easily see how the bending in the direction observed in the recovered section of the disc occurred if it moved rearward."
The point I made regarding the rear bearing of the HP shaft was just a clarification item from my original post. But, I am still not sure in my mind exactly where the stub pipe was located that failed. Was it in the HPT/IPT bearing area in the turbine section of the engine or at the bearing location in the compressor section of the engine. The observation made in the ASTB report stated only some components forward of the fire wall were heat affected. I take this to indicate the fire was in the turbine area not the compressor area, but I could be wrong.
Turbine D