Stripped Servo??
I recently graduated from an electric park flyer to a nitro plane--sturdy birdy with an os .25 engine. I've flown it three times on my property. When I tried to land it the second time I came in a little to high and fast and applied throttle for a go round, but the plane went behind a barn on our property and I lost sight of it. You can guess what happened--it crashed pretty hard nose first.
I repaired the engine and flew again without incidence, but after I landed, the throttle servo would not work. It seems as though the internal gears may be stripped. I can hear the motor moving but no motion on the output. Is this something that happens to servos from time to time?