Originally Posted by
SASless
How many hours did the two gearboxes have that failed?
How much of a margin would be appropriate to guarantee safety?
I'm assuming that as per AH/European/US conditions they will only be using the type of epicyclic that hasn't resulted in catastrophic failures. If so it will be interesting to see if any decision to allow a return is based on a better understanding of the bearing failure on the crash aircraft than was previously reported. Realistically not a lot will change anytime soon as few UK aircraft are likely to return to service in the short term.