As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAS - ON APPROACH CAPTAIN REPORTED RECEIVING SLAT LEADING EDGE ASYMMETRY WARNING LIGHT. ABORTED APPROACH AND DID GO AROUND. EMERGENCY DECLARED, LANDED LAS WITH SLATS AT 20 WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. NO FAULTS FOUND. CYCLED SLATS SEVERAL TIMES. SYSTEM GROUND CHECK NORMAL OPERATION.