Time to revamp the preflight checklist:
“Knob on the power lever is secure.”
“Check”
FAIL 1: Door seal
FAIL 2: Pressurization
FAIL 3: Propeller warning light
FAIL 4: Knob on the power lever came off
Uh huh. Sure.
I once had a situation where I could not reduce power below about 16 or 17 hundred rpm. I called for the long runway and made an approach. To finish the approach and land I remembered what they did in the old rotary engine aircraft in ww1. Turn the magnetos on and off. I made the first turn off and used the same method to get all the way to my tie down spot.
A compadre of my dad’s did the same thing in 1943 in an a36 apache to make it in when the throttle quadrant had been destroyed by a cannon shell.