As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, UPON SELECTION OF FLAPS 1, THE LEADING EDGE SLAT DISAGREE WARNING LIGHT ILLUMINATED. AN EMERGENCY WAS DECLARED, THE FLIGHT CONTINUED THE APPROACH, AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NR 20 LEADING EDGE ACTUATOR. SUBSEQUENT SYSTEM TESTS WERE SATISFACTORY.