Had the prop on a DH8-200 with PWC123 engines fitted, autofeather just on lift off, whilst still producing take-off power years ago.
The highest Tq I recall seeing was 125%. Apart from Np, all other engine parameters were normal. The highest observed Tq exceedence didn't require a special inspection. The cause was determined to be a faulty signal from the EEC, in turn caused by a poorly fitting canon plug. The plug was repaired and we were on our way.
The hardest part from my perspective, was the mind numbing confusion caused by a feathered prop with Nh, TGT, FF all in the take-off range!
It shouldn't have feathered, and it seemed to take for-ever to get past the contradictory indications. A legacy I guess from all prior multi training being in the aircraft (not sim) where the throttle would be retarded to simulate a failure and the confirmation would be from low TGT/Np/Nh.