Jam nuts serve a purpose and that is to prevent actuating arms from becoming disconnected. I found three examples on the same airplane. Two flap jam nuts were loose and should have been caught on a preflight, and the autopilot servo arm jam nut was loose as well. Any of these could cause a flight control problem if they came completely loose.
In Case You Missed it
Archive: October 1994
Our October 1994 issue led off with the “wet and wonderful” Seawind 3000 composite...
Bearhawk Duo in the Land of the Long White Cloud
Mike Taylor - 1
Jonathan Battson and Lars Fellman build the first two 4-Place Bearhawks in New Zealand.
Vacuuming Connectors
David Paule - 0
Vacuum electrical connectors before installation to avoid difficult troubleshooting later.
Loctite and safety wire , I have yet to have one come loose