As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE CREW RECEIVED A LEADING EDGE SLAT ASYMMETRY FAULT INDICATION. EMERGENCY DECLARED. LANDING UNEVENTFUL. THE AIRCRAFT WAS GROUNDED. MAINTENANCE REMOVED AND REPLACED LEADING EDGE SLAT PROXIMITY SENSOR SWITCH S277 IAW AMM 27-88-01.