Originally Posted by
ATC Watcher
Might have been in the early pistons aircraft types when it was introduced, but all the events I remember were I always at or right after take off , Having that on base leg with reduced power ? and as you said, on both engines at the same time ? Weird.
I've heard of un commanded auto feather at reduced power setting on the Basler (Turbine DC-3) Which I'm sure have a more Mickey Mouse type of auto feather system than the ATR. The thing to know is if you have an un commanded prop going feather by itself while both engines are at low power settings, as they normally would be close to final, the highest torque of the two would be the one who feathered! Not the other way around. So if you rush things it's easy to "secure" the wrong engine thinking the good one has failed ending up with both prop feathered.
Disclaimer: I'm in no point saying that's what happened there but that is a possible scenario on another type of aircraft.