When I landed yesterday after a good day of flying, I discovered that the J-5's trim was stuck full nose up. The crank in the cockpit turns but the stab. doesn't move. I didn't get a good look at it last night, planning on going out tonight and trying to see if i can get someone to help to give a little help on the stab. when I crank to see if that frees it up. Unlike the prior posts, temps are warm, in the 80's. Any thoughts?