I'm running the Futabab Gy240 gyro in my raptor 30. I've been using the rate mode since I got it in August and switched it to AVCS (HH) mode yesterday. Everything seemed to work fine. Today I take it out and the heli started doing slow counter-clockwise pirouettes. I switched back to rate mode and it worked quit turning. It's seems to change the center point of the servo depending on which mode I'm in. Is this a gyro malfunction?

Ryan