As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK (REPEAT ITEM) CREW REPORTED LEADING EDGE SLAT ASYMMETRY. EMERGENCY DECLARED FLIGHT RETURNED JFK LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND SENSOR S280 FAULTED ON PROXIMITY SWITCH ELECTRONICS UNIT. REPLACED SENSOR S280 AND RE-SECURED TARGET FOR S280. SYSTEM GROUND CHECK NORMAL OPERATION.