This AD was prompted by a report that during a production ground test, the flap position switches were not properly rigged and allowed the actuator to travel beyond the commanded flaps' full (fully extended) position. The FAA is issuing this AD to prevent the flap actuator from overrunning the flaps' fully extended position if the full position microswitch is either missing or not rigged properly, resulting in an uncertified flap configuration. The unsafe condition, if not addressed, could result in loss of control of the airplane.