I bet there is some good threads about this over in the airplane section maybe you could look into.
Another thing that can cause these problems to come and go and your using the same radio is there is some metal parts somewhere in the model thats not tight. Metal rubbing somewhere, or loose bolts/screws.
I have actually taken my hand and gone around the model physically trying to move parts with the radio and receiver on looking for a glitch. And sometimes you can find it.
oh, here is some more reading material on this.
http://www.rcuniverse.com/forum/RF_I...2634966/tm.htm