Van's Aircraft needs to wake up and make this standard practice to have safer aircraft at virtually no added expense. mechanically, a jam nut alone is not sufficient at this location because a jam nut does not allow for bolt stretch to hold clamp and thread friction is lost. a jam nut is an archaic fastener system, and it can become loose between inspection intervals.
with all the discussion about loose control linkage jams nut over the years, Van's Aircraft has never properly addressed it.
jam nut service bulletin
https://www.vansaircraft.com/wp-content ... ection.pdf
