All airplane manufacturers have to design for possible uncontained rotor burst.
And since Sioux City, they've done so to some extent, haven't they?
Even hanging the engines under the wings, we can see some nasty damage, as just now.
But at least this uncontained failure didn't take out both all conventional rudder and elevator control in a single shot....
Still, let's all agree there was a degree of luck in this eevnt.... ?
It could have happened slightly earlier or later and we'd now be fishing for the CVR and FDR, instead of looking at photos.
Or there might have been a huge crater where that village on Batam now is?
Simplistically speaking, uncontained rotor failures are just not supposed to happen.
Let's hope there's not another one in the next few weeks through beancounter shortsightness somewhere.
The outcome might not be as fortunate.
CJ