I'm very sorry for your loss.

I have been flying an Extreme Jets Dragon and had a similar thing happen to me. There is a thread on it somewhere here about 3 months ago. It had done 1 uncommanded roll which I thought may have been me being too slow and and incident at the top of a loop which I also thought was me being to slow. What I finally figured out was that I had a Smart Fly EQ2 running my flaps. After my incident (VERY similar to yours except I saved it) a swapped out my RX and increased the channels, replacing the EQ2 with another channel (went from a JR 921 to a 1221). The Dragon has been rock solid since.

I put the EQ2 on a giant scale Mustang a couple of days ago. I was setting the control throws when low and behold the right flap went down, held for 2 seconds and then went up again. Uncommanded. I reset the TX and the RX and went back to setting the throws. Guess what! About 3 minutes later the right flap did it again! I am summizing that my problem was caused by just this thing happening on my Dragon.

No consolation, but at least I think I found an explanation for my troubles!

Jim