As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 3998 THE CREW REPORTED A LANDING AIR/GND FAIL MESSAGE WHEN EXTENDING THE LANDING GEAR AND STAYS ON UNTIL GEAR IS DOWN AND LOCKED. MAINTENANCE REPLACED THE LEFT NOSE LANDING GEAR DOOR ACTUATOR. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED FOR SERVICE.