I was flying along, practicing rolls, and the aileron servo failed.
I had just finished a left u-turn and was flying left to right, and the heli started doing clockwise aileron rolls (to the right) and I couldn't stop it.
I flew along in a more or less straight line with full left stick, getting lower and lower, and I finally hit t-hold and let it go in.
When I got to the wreck, the engine will still turning over at a fast idle - so I pinched it off and started to survey the damage.
It tore off the 4 mounting feet off the front & back frame, bent the landing skid all to hell, broke the CYB Stick Bangers and bent the flybar. "Lucky" for me, the heli hit skid-down on one of its rolls - I think it would have been worse if it had hit head first.
Before I shut off the radio, I checked to see if the RX & satellites were blinking - nope, still solid.
Then I wiggled the sticks, and saw that the aileron servo was stuck full-lock to the right. So I tried to move the wheel - and I couldn't move it - it was like it was commanded to be at full lock.
After I turned off the radio, I could move the servo by hand - no problems. No roughness or grinding.
As soon as I turned on the radio - hard over.
It was a Align DS610 running on a Scott Gray Reactor II set at 6.0v - so it wasn't above spec on the voltage.
And, it was relatively new - less than 20 flights on it.
Now, I am mad. I though the Align stuff was okay - I guess it isn't that good.
No pixs of the damage.
$150 for airframe, $120 for new blades plus at least one servo.
I already use the JR DS8717 for collective. Maybe I'll get two more of those for the pitch & roll.