Cafeenman, on my giant PT-19, it went into fail safe because I had the switch for the radio and the kill switch to the engine right next to each other. That caused it. Took a while to figure out. On the heli, a bearing was going and that caused it. Equally hard to find. I like having the safety of PCM. I have had a few times when I was in the air someone turn on the same freq. Theirs went nuts, mine never knew. I just think it is safer.