As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND DURING GEAR RETRACTION, CREW RECEIVED A NOSE LANDING GEAR DOOR WARNING LIGHT. CREW PERFORMED COM PROCEDURE AND RETURNED TO DTW AND MADE AN UNEVENTFUL LANDING. DTW MAINTENANCE REPLACED A DEFECTIVE O-RING IN METERING ROD GLAND NUT. LEAK AND OPERATIONAL CHECK OK.