The 76 is started with the brake on to preserve the gyros for the instruments etc...
Canada is the only place I have seen this and I don't necessarily agree nor disagree. I do wonder how the rest of the world has survived for so long without all the zany ideas about operating the 76 around here...
It is simply in the OPM so I have to do it.
It is ugly and disconcerting to look at when you see the slack (backlash) in the intermediate and TR gearbox's, taken up with such force as the engine force is driven into the TR driveshaft.