more than possible once the case broke, only have to go to ~20 degree's to 'free' the rollers, ie. more than likely to have happened during the event
the cracked gear (bottom left) looks like it was caused by the event too, as it the distortion of the gear, rather than fatigue.
can't tell from these what the root cause of the failure were, could have been anything from a big chip/bit floating round the box or the failure of one of the rods then placing a massive angular load on the epicyclic.
None of this is the smoking gun.