As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THEY RECEIVED A LG AIR & GND FAIL MSG AFTER TAKEOFF & THAT THE LG WOULD NOT RETRACT. THE CREW RETURNED TO FIELD & LANDED WITHOUT INCIDENT. THE ACFT WAS FERRIED FOR FURTHER MX. MX REPLACED THE LG ELECTRONICS UNIT & THE NLG WEIGHT ON WHEELS PROXIMITY SWITCH. OPERATIONAL CHECKS & LG SWINGS WERE GOOD WITH NO FURTHER DEFECTS NOTED.