I recently crashed my QQ Yak due to two aileron servos(5945's) failing. One was totally dead, the other would only move in one direction. The elevator servos(also 5945's) and rudder (5955) servo are fine. I was running everything off of 6.0V NiMH batteries. I tested the servos on another receiver and battery with the same result. I have sent them in to Hitec, but I still wonder WHY??? Anyone have an idea? I sure don't. Dale