As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE NOSE LANDING GEAR GREEN LIGHT ILLUMINATED AFTER LANDING GEAR RETRACTION. RECYCLED LANDING GEAR. LIGHT REMAINED ILLUMINATED AND THE RIGHT MAIN LANDING GEAR UNSAFE LIGHT ALSO ILLUMINATED. AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED NOSE LANDING GEAR DOWN AND LOCKED SWITCH. OPERATIONAL CHECK GOOD.