Hey Gary, I did the same thing this summer, but in my case it was definitely user error. After flying for a while I brought the plane in, adjusted some setting on the radio, turned the radio off (for some unknown reason), then proceeded to throw the plane right into the ground as hard as I could. That was not a good feeling at all
Lots of lessons learned on that one. I now almost obsessively trigger the launch preset a couple of times before each launch an listen for the elevator noise.