Marty, for the benefit of us that have been flying the type for quite a few years.....What is an adas? I don't know that such a device is fitted to Australian Dashes
Double Max Continuous on the PW123E is 180%. I don't think so. I find it difficult to understand that not only did the crew experience an unscheduleded feather, but the backup system (torque meter) failed also?
In any instance, the QRH dictates do nothing until plateau height. If the crew followed the QRH, they can hardly be blamed for the backup system failing (which seems to be the feeling I get).