RE: crash nothing wrong
AirRaptor, Do you have your failsafe set up? Reason I ask is that if you were getting intereference and the Rx kicked into failsafe your plane could have held neutral throws and reduced the throttle to idle or whatever you set it up to do. A clear indicator of loss of signal from the Tx. Of course failsafe only works if the Rx has power.
Even if your failsafe isnt setup, Im leaning toward Live Wires idea that you were losing battery power intermittently due to either a bad switch, poor switch orientation, bad battery lead,....
Cheers,
James