(Lee Elson) wrote in message . com...
91.109 prohibits some types of instruction without "fully functioning
dual controls". Can anyone point to an FAA source for how this phrase
is defined? While throw over yokes are dealt with in 91.109, what
about dual brakes and rudders?

I'm not sure what the offical regulation requires, but I can tell you
that I took my private checkride in a Cherokee with dual rudders, but
only pilot-side brakes.

-Chris