Yes, it is.

Clarification: I suspect I know the cause. Post mortem did not reveal any other potential causes.

I won't delve into the binding process. Too many different radios and each needs to have the manual read and understood. That's one of the lessons learned in this event. Some manuals are excellent and have a lot of depth, and some not as good, but all have information that needs to be used when setting up and using the equipment. How can you do it right if you don't know what could be wrong?

Same applies to engines, recievers, servos, linkage installations, fancy electrical accessory equipment, and mounting practices. This event exemplifies my opposition to "buy and fly" products. if the owner/user does not understand what they have the only people that benefit from the sale are the manufacturers and distributors. Nothing against arfs in general, but way too many people entering the hobby from the high end becasue of easy, ready to fly, big plane availability. There's still something to be said about picking up some of the basics first.