Originally Posted by
rotorspeed
...whether the problem that caused the pilot to turn back 50 secs before total engine failure was one that should have prompted an immediate shutdown of the first malfunctioning engine...
Exactly. If he had a low/no engine oil pressure indication for 50+ seconds and did nothing about it, except divert, little surprise the engine blew up and took out the other one. I said, if. Just saying.
Generally I agree with SASless comments, there is no urgent need (even for an engine fire indication)...but if the engine has no oil pressure with secondary indications I'd be shutting it down pronto before punching the clock.