Originally Posted by
rickair7777
If the friction lock let the power lever retard, AFX would not activate, obviously. Apparently there was a history of that, both failures and simply forgetting to set the friction (commonly after Mx work was done).
When I flew turbo-props, failed AFX was a staple in training. I always always always assumed an engine was going to fail when I set power for T/O... too much complexity in turboprops to try to wing that.
I was taught from day one to keep my hands on the throttles at all times below 1000 feet. Too many stories of friction locks letting throttles work backwards during critical flight. I don't like much friction on those because the throttles become so jerky and easy to over-shoot. I saw the newest version has full authority digital engine control.