As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3121 THE CREW REPORTED THE NOSE GEAR UNLOCK LIGHT FLICKERS ON SYSTEM 1 IN FLIGHT WITH GEAR RETRACTED. MAINTENANCE FOUND NOSE GEAR SYSTEM 1 LIGHT SOCKET LOOSE. TIGHTENED THE SOCKET AND CLEANED THE NOSE GEAR PROXIMITY SENSORS. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.