Just to correct the above ..........
The aircraft that crashed with a catastrophic gear box failure was in fact a 332L2, and not a 225.
The cause of this crash has still not been determined and whilst it is fair to say that both types have a similar gear box, they are not the same. The 225 has a basically identical layout to the L2 but has been 'beefed up' for want of a better phrase.
And with regard to the certification of the S92, I refer to previous responses within this thread that questioned, How do you qualify 'Remote Possibility' on a brand new aircraft type ??