OCTANE 100
Yes the 139 rotating scissor bushings definitly need improvement in terms of service life. I have personally complained to Agusta about it. Right now they are testing bushing from 3 different bearing manufacturers. In the mean time Agusta has increased the allowable play in the scissors assembly. The real trick is to shim the scissor bushing fairly tight and that seems to help quite a bit and increases service life of the assembly before removal.
I highly recommend operators that fly lots of hours keep a healthy stock at hand of the scissor bushes. I also have a spare rotating scissor set which speeds up maintenance when its time change out the worn bushes.