Turbine D
Good morning. From the outset, I took the "aft migration" of the IPT to imply involvement of the Thrust Bearings. There are two HP/IP cavities, fore and aft. I can't explain why I have been focused on the one forward all this time. I took 6,7 to be radial take up only, so axial slop seemed unlikely to be located here. If its dedicated oiling supply tube failed, either location would be prime candidate for disaster?
The more I "get" of the mechanism of this powerplant, the more impressed I become. Borders on awe, really, and the more I also become convinced that poor stewardship of this fine machine has caused damage to its market. That is inexcusable. The fault is most certainly not with her engineers, but her Step-parents, focused on profit, secrecy, and deception.
bearfoil