As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH INTO DTW WHEN SLATS EXTENDED, SLAT DISAGREEMENT LIGHT ILLUMINATED ACCOMPANIED WITH AIRCRAFT ROLL. WHEN SLATS RETRACTED THE LIGHT EXTINGUISHED. FOLLOWED COM PROCEDURES AND MADE AN UNEVENTFUL LANDING. MAINTENANCE FOUND THE RIGHT T-DUCT GROOVED AND LEFT WING T-DUCT WITH .1562 INCH OF PLAY. REPLACED BOTH T-DUCTS. AIRCRAFT RETURNED TO SERVICE.