As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE NR 6 LEADING EDGE SLAT WOULD NOT RETRACT AND, DURING RETURN TO FIELD, WOULD NOT EXTEND PAST MID POSITION. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT GROUNDED. REMOVED AND REPLACED THE NR 6 SLAT INBOARD LEADING EDGE PROXIMITY SENSOR IAW AMM 27-88-11-400-801 AND ACCOMPLISHED OPERATIONAL CHECK IAW AMM 27-81-11-000-801. SYSTEM CHECKED NORMAL.