As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING THE REPLACEMENT OF A FLAP ACTUATOR AND DURING TESTING, THE NR 4 FLAP PANEL CEASED TO MOVE. IT WAS FOUND THAT THE FLAP FLEXIBLE SHAFT HAD INTERNALLY CORRODED AND FAILED. THIS ISSUE WAS FOUND ONCE PRIOR UNDER SDR NR 20030825014 BUT WITHOUT THE EVIDENCE OF CLAMP INTERFERENCE. WATER HAS ONCE AGAIN FOUND ITS WAY INAND STAYED IN THE LOW POINT OF THE CABLE. THE CABLE WAS REPLACED AND THE SYSTEM CHECKED OK. MFG HAS ONCE AGAIN BEEN NOTIFIED OF THIS CONDITION.