As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - FLIGHT 9379 - AFTER DEPARTURE, THE CREW REPORTED A LANDING GEAR AIR/GROUND FAIL MESSAGE, ALONG WITH A ENGINE 1/2 REV DISAGREE MESSAGE. THE AIRCRAFT RETURNED TO TYS AND LANDED WITHOUT INCIDENT WHERE MAINTENANCE REMOVED AND REPLACED THE NOSE LANDING GEAR WEIGHT ON WHEELS PROXIMITY SWITCH. THE AIRCRAFT OPERATIONALLY CHECKED GOOD AND WAS APPREOVED FOR RETURN TO SERVICE.