As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RETURNED TO FIELD AFTER TAKEOFF FROM DEN DUE TO LT OVERWING EXIT OPEN INDICATIONS. MAINTENANCE WAS DISPATCHED TO THE AIRCRAFT. MAINTENANCE OPENED AND CLOSED THE LT OVERWING EXIT DOOR, VERIFIED DOOR INDICATIONS WERE GREEN AND NORMAL, OPS CHECK GOOD PER EMB AMM. A/C WAS THEN RETURNED TO SERVICE.