Turbine D
I take note of your reference to "rupture" of the Disc; if you agree, I will use your term for Heat/Friction/Pressure failure instead of 'explosion'. The kerfuffel re: this word is distracting. If the splines have failed relative to the AD's portent, I do not envision a "smoothe" transition aft of the IP Wheel. At best, perhaps a stuttering and
rapid, oscillatory transition aft, not a "migration". If an excess of swirl combustants from the Shaft's interface with the HP bearing/Shaft foci, (due to "Oil Fire"?), This may have been sufficient in and of itself to part the Drive Arm from its join with the Shaft Flange.
I've yet to read your reference, I will. I also think you sit upon a vastly greater fund of knowledge than I. You asking questions for clarification of me tells me this is so. Just "musing".
Your reference to the HPT bearing? Is that an invitation to discuss what may have been the results of loss of lubrication? Cooling? (Oil Related)? Unclear to me.
regards bear
bear