As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND DURING TGEAR RETRACTION, CREW RECEIVED A NOSE LADNING GEAR DOOR OPEN LIGHT. CREW PERFORMED COM PROCEDURE AND RETURNED TO DTW AND MADE AN UNEVENTFUL ALDNING. DTW MAINTENANCE REPLACED THE NOSE LANDING GEAR DOOR SWITCH. OPERATIONAL CHECK OK.