Originally Posted by
helicrazi
I'm struggling to remember where and when but hasnt this churning issue happened before and had a very similar situation.
It was Brunei in 2008 (11:26 on18th Jan to be precise!) The symptoms were a lot more dramatic and rapid though, but possibly because in this event the engine was brought to idle. That was one of several changes that came in as a result (including Adding the INPUT HOT caution).