As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, THE NR 4 LEADING EDGE SLAT INDICATED STILL DOWN ON SLAT/FLAP RETRACTION. AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPLACED THE NR 4 LEADING EDGE SWITCH S-205. PERFORMED OPERATIONAL CHECK OF SLAT/FLAP INDICATION SYSTEM, OPERATIONAL CHECK OK.