real sorry about your pt40, i just love the heck outta all my ww2 warbrds. as was said b\4 IF it was outside interference, (as took place lastyear across the big pond @ a jet rally) then you must do eveything you can to prevent another incident like maybe checking out a flight system receiver that locks onto your frequency and rejects all others, even supposedly on the same channel. if im to cart my plane home in a sack then i want it to be my doing, as i have alot more than mere $$$ invested in my bird! other than this i think your idea of a detailed autopsy is going to be your best bet for answers good luck, Ted aka flip-flop-fly!!