As for the actual cause of the engine failure, the report kind of points the finger at the shop that did the bulk-strip that occurred seven flying hours before the failure. It goes to show the trust we place in our mechanics -- I would never have checked, in pre-flight inspection, the part that seems to have failed in this case.
Why blame the shop that did the bulk strip??? I bet they did not fit the engine in the airframe.
Engine shop would have bulk stripped the engine and then shipped back to the workshop for re-installation to the airframe.