RE: Futaba 608FS reciever locout/failure due to heat
Something is not right.
You say "the plane lost signal and went full throttle".
If failsafe was set correctly and was activated it should've went to idle.
OR
If it was a receiver failure the servos should've remained excactly where there were. Just 1 servo (ie the throttle) going to max seems unusual. Why didn't the other servos on the aileron, rudder and elevator also go to full travel.
If he was taxing at the time i would expect the engine to remain at taxi rpms just above idle.
I have read many reports of these heat related failures an so far i have not read one that says the servos moved when the receiver shut down.