Arriel 1B huh? Now that seems to be one damned fine engine if it has tolerated FOD some two years back that has apparently taken out the interior of the engine, yet no-one has noticed it.
No vibes? No power loss? Just kept on haulin' a*s.
Doesn't seem that there's any design problem if the chain of events are as written.
I saw a copy of the IFSR for the Arriel a few years back and it was impressive for its reliability. If I recall correctly I could expect an in-flight shut down from all causes (fuel exhaustion, false indications, minor fault precautionary included) each 100,000 or so hours and a catastrophic type engine event each 500,000 or so flight hours.
Going on the data I saw it seemed that I could expect the thing to go BANG once each couple of thousand years at the rate of effort I was doing. Then again, it could be tomorrow, couldn't it?
I still feel real comfortable with them though.
(O.K you guys, I know it's French)
STL