Kikolobo:
I might also need to work on being smoother, but if you put the collective down all the way to practice an autorotation LIKE scenario (without chopping the throttle), the NR will go up, no matter what, even in a 407. You might even split the needles. How much? it will depend on your setup, but it will!. Even with your throttle closed it will. In a 206, the N2 also increases a bit until the gov catches it. But it takes time.
So...with your huge 100 hours you're going to try to teach *me* about 206's?? Listen, sonny, my butt has left it's very considerable impression in more 206 seats for more hours than you could ever imagine. I've probably got more time in the 2-minute cooldown than you have
total. So stop acting like the biggest 206 expert to ever leave Ft. Worth.
Here's the deal: If your RRPM goes high upon power reduction, high to the point where you get an N2/NR needle split, then your
governor is working fine, ie. it's bringing the N2 back to 100%. But it's having to work too hard...for some...inexplicable...hmm...what could the reason be? Here's an idea, while your mechanic is checking out the governor, you might also want him to turn your auto rpm down. Sounds like it's much too high. With just a pilot and minimum fuel on board, it should be in the low green; the Bell maintenance manual will have the correct parameters. Having the auto rpm properly set in a 206 will help avoid overspeed problems when reducing collective pitch.
Auto rpm is one of "those areas" where pilots sometimes get mechanics to compromise. None of us really likes to see the auto rpm in the low green. Our brains tell us that the auto rpm simply *should* be 100%. But that's not the case, is it? The 206 operates at a wide range of weights, from oh, 2200 pounds or so up to 3350. So if we set our auto rpm for 100% at minimum weight, we'd be flinging the tip weights off and stretching the TT straps at 3350 as the NR tach tried to come back around to zero.
Kiko, sounds like your 206 needs a good tune-up. (Be sure to check the points and plugs while you're at it.)