Well said Concentric!
As a nobody who used to overhaul a lot of AH epicyclics, I find it difficult to believe that AH seem to think the gear will spall before the inner race. The inner race has the load concentrated in one area, whereas the gear is rotating, spreading the load.
If the gear really does spall before the inner race and then this spalling has the possibility of inducing a fatigue failure, then there is definitely something wrong with their gear design/metallurgy.
The inner race should be spalling well before anything shows up on the gear, producing lots of nice flakes to set off the appropriate alarm, before anything catastrophic happens.
I'm not saying it doesn't happen, but I never saw an epicyclic gear with spalling. The inner race would lunch itself and contaminate the gear, leaving it with a pitted look, but not spalling on the gear itself.