As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING INSPECTION THE B-NUT ON THE FLAP DRIVE CABLE WAS LOOSE, AN ATTEMPT TO TIGHTEN THE CAUSED THE NUT TO BRAKE INTO TWO PIECES, THE NUT WAS CORRODED AT THE SEPARATION POINT. DO NOT KNOW IF IT WAS OVER TORQUE ON INSTALLATION OR IF THE NUT WAS DEFECTIVE. THE CABLE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.