New Extra 300S on third flight. Flying straight and level, down runway, at half throttle, when suddenly a loud noise(sounded like a shot), followed by a piece of the aircraft(later determined to be the right aileron servo) being blown away from the top of the wing. A second or two later, a cracking sound and then a complete separation of both wings. First two flights uneventful, only mild aileron rolls, and two normal landings. Aircraft weight less fluids was 16 lbs. 2.4 gas engine, top of the line servos. Noted this is 2nd crash of 300S in last 48 hours with almost identical circumstances. What's going on? Your thoughts, please