My Rx and Yak54 of 5 years decided to go South a few weeks ago. Glitch, oops!, Big glitch OOOOPS!, Not listening, bang! 20MPH straight down at about 1/3 throttle. 26cc Petrol engine destroyed and wiring looms snapped as the various bits of plane disengaged from their partners. Pretty comprehensive considering it was a soft ploughed field.
I have 1 good servo and a Lipo though!
Wood burner job that one