II - don't forget that it was 167 hrs flight time. We don't know how long it was sat on a shelf or in a heli under construction before that. Probably thousands of static hours. So lots of time for the corrosion to develop, just not very long for the consequential crack to develop!
Really? You really saying that EC kick out transmission components that are corroded to such a degree you only get 167hrs out of them?
In any event what drives the TBO number?
Isn't it reasonable to expect a manufacturer to have undertaken enough of a test program to capture such faults that might occur within that timescale? (167hrs).
The problem here would seem that the two accidents threw up a host of issues that clearly they had the capability to fix and were so fundamental that one wonders why they were even issues in the first place.