I'm reading this and few other discussions and it amaze me to see the lack of "30 minutes run dry capability" being perceived as the biggest issue here. Because:
A. I can't think about a design in a 12ton MTOW airframe that would be trully capable of that. And actively cooling components doesn't count, as that's more of a "semi-dry" and not truly dry system, and when that system fails, the MGB will seize in minutes if not seconds.
B. What if such system would be made and put into the S-92, and another crash took place... would we write then, that's because there is no 45 minutes run dry capability ?
That one gearbox withstood more than was needed to safely ditch that helicopter. There are other things that are wrong with that airframe, as noise, vibrations and poor "hot&high" performance, yet barely anyone mention it, and every third post I read is about that mythical 30 minutes dry run thing.