there is a depressing runaway trim transcript on

http://www.aero-news.net/news/commair.cfm?ContentBlockID=dddbd6c8-3e4a-4e51-90ca-d93181e0df16

I've had two runaway trims... once in a 4p when it
was wired backwards, and once in a legacy, when the trim
would only move one way.. in both cases it seemed to me
that everything I did made matters worse.. its very
frustrating and the plane gets very heavy...

slow down and land is the answer..

(the speed of the elevator trim in the 4p is also an
issue, but on newer kits the correct slowing resistor
is supplied)

think, think, think....