Np spikes? Anyone experienced this.
Have any small / GA pilots have had issues with Np indications having indicated momentary highs?
I have heard of issues with a few Np tacho generators. The prop isn't hunting, all other gauges fine, just momentary highs in the Np.
There has a been deep fault finding, and seems to come back to a single batch of tacho generators. They are used on many engines, so in this case assume it was on a turboprop.
Please, leave replies to folk who have actually seen this in flight.
Thanks in anticipation of a flood of replies.