Originally Posted by helik7
After a few flights, one of the actuator (for the rudder) stopped working. Any one has any idea what happen and how to fix the problem.
Assuming the rudder is not jammed, then:
Either the coil wire is open circuited or shorting together, or it lost connection to the receiver, or the drive IC on the receiver failed. Continuity check the coil first to help pin point the problem.