As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT INBOARD LEADING EDGE FLAPS WOULD NOT RETRACT AFTER TAKEOFF. LEADING EDGE FLAP SYSTEM WAS OP CHECKED FOR DISCREPANCIES, NONE WERE FOUND. THE CENTER FLAP CONTROL UNIT WAS REPLACED, AS A PRECAUTION. ALSO, AS A FURTHER PRECAUTION, THE NR 3 LEFT HAND LEADING EDGE FLAP DRIVE UNIT WAS REPLACED.