Robbieengineer - First off the FIRST incident about three weeks ago was an ag machine, this one a couple of days ago was a tourism machine and knowing both operators I highly doubt they would be overstressed or pushed past the limits.
Secondly - If the accident investigators who attended the crash scene found something that caused them enough concern to ground all other 44s with -7 blades then I doubt they would have done that lightly. I spoke to one of them on the phone and based on what they told me they saw they did the right thing.
Give the NZ CAA investigators and Louisa Patterson a call and tell them its a knee jerk reaction.