As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE NR 3 LEADING EDGE FLAP DID NOT RETRACT ACCOMPANIED BY A LEADING EDGE FLAP STATUS MESSAGE. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED THE NR 3 LEADING EDGE FLAP DRIVE UNIT AND FOUR RELAYS, OPERATIONAL CHECK GOOD.