As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT AFTER TAKEOFF, THEY RECEIVED A LG AIR & GND FAIL MSG & THAT THE LG DID NOT RETRACT. THE CREW ELECTED TO RETURN TO FIELD & LANDED WITHOUT INCIDENT. THE WEIGHT ON WHEELS PROXIMITY SWITCHES WERE INSPECTED WITH NO DEFECTS NOTED. THE ACFT WAS FOUND SAFE FOR FERRY FLIGHT & WAS FERRIED TO A MAINTENANCE BASE FOR FURTHER TROUBLESHOOTING. AFTER A SUCCESSFUL FERRY FLIGHT, FOUND THE LG ELEC UNIT AT FAULT & REPLACED THE UNIT. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.