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Old 17th Jan 2018, 13:26
  #124 (permalink)  
Flying Bull
Join Date: Feb 2006
Location: Germany
Posts: 745
@T&S - causes were found, rollerbearings from one Manufaktura were within limits but slightly different in shape and in both incidents within the gearbox.
These are withdrawn and no longer appoved.
Second was a rough handling (drop) of the gearbox recorded.
Gearboxtransport is now closely monitored and gearboxes, which suffer rough handling or i.e. a lightning strike are withdrawn from service.
Additional Checks to discover metal are brought in, the runtime of the gearboxes are reduced.
What else do you want?
A new gearbox design?
Nearly every helicopter has planetary and sun gears and therefore could have the same failure- where as in a 225 the fault was analysed and the risks reduced as far as possible.
With the rollerbearings now only permitted was no accident so far, with the ones withdrawn two.
Even with a high pressure behind getting the 225 airborne again, Im quite sure, that Airbus knows what will happen, if a similar accident happens again and wont take that risk...
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