Originally Posted by
Hot and Hi
Sorry, “no” again. The scroll nut will not move relative to the scroll if there is engine (or rotor) overspeed in flight. (It may indicate though that engine was started with open throttle, which sometimes is referred to at overspeed at startup.)
What's the answer then? I cannot find anything mentioning post-flight indications of an overspeed in the POH or learning materials. MR gearbox teletemp?