Halo heli-pilots,
sat news from Czech republic. One of our friend was involved in
fatal accident. Is already proved, that the reason of fatal accident was the broken tail blade. It become apart during flight, made the CH-7 uncontrollable. We have already information from UK pilots-owner of CH-7 already reported detection of macroscopic cracks found in materials of tail blades during first 100 hour inspection!
The aviation laboratory reported skin cracks. The problem is even worse! Immediately after the crash, the investigators found, that there was same problem on two previous cases and the blades has been changed just last minute before catastrophe. Third case caused death. You can read the unbelievable official report
here
Most important part is:
V provozu byly v minulosti při předletových prohlídkách zjištěny na dvou jiných ULH stejného typu trhliny na listech ocasní vrtulky, a to ve stejném místě, kde při výše uvedené nehodě došlo s velkou pravděpodobností k oddělení listu od tělesa vrtulky. V těchto případech nebyl let proveden a listy vrtulky byly vyměněny bez dalších následků.
Briefly translation (or use google translator to read all) is: There was two cases before, but the blades was changed in last minute...
More pictures
here 
