Originally Posted by anartificialhorizon
Exactly Firebird..........
Just got to look at the BMid Kegworth incident to see what can happen with engine vibration, complete disintegration of the hot section in that case........
A return to stand would at the least require a run and if vibration confirmed ( ie not an indication problem) then boroscope etc
Definitely a rejected take IF, and that's a big IF, spotted by the crew.
No idea where this is coming from or how it relates to the subject thread
Kegworth did not start with vibration indications to the crew, it started with no symptoms other than a big bang, followed of course by vibration. As it turned out the bang was from the cold section and not the hot section.
The recommedations regarding vibration response to the crew are to take the time to make your judgements for reaction based on other engine instruments since engine vibration displays by themselves are inherently advisory in nature. As for trobleshooting on the ground the mechanics need to follow recommended procedures based on exoerience.