Severe CAVOK, you have mis-quoted me there, what i said was:
The most reasonable cause at the moment looks like a badly designed actuator on early Q400 aircraft causing accident's #1 and #2. With accident #3 caused by poor maintenance procedures and/or fitting of the new actuators.
If you have a look at preliminary reports you will see that the O-ring should not have been there at all.
SAS didn't make their decision based on the safety of Q400. They haven't questioned the safety.
Of course they have questioned the safety. Otherwise they wouldn't have stopped flying them. Agreed, they had to do something because of the bad publicity being generated but it was done off the back of the final accident which
at the moment doesn't look like it is Bombardiers fault. If anybody has "jumped ahead" of the AIB report, it's SAS.