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. MAINTENANCE REPLACED THE LEFT-HAND WEIGHT ON WHEELS PROXIMITY SWITCH NUMBER 1, THE RIGHT HAND WEIGHT ON WHEELS PROXIMITY SWITCH NUMBER 1, AND THE RIGHT HAND MAIN LANDING GEAR WEIGHT ON WHEELS WIRING HARNESS W510. OPERATIONAL CHECKS AND GEAR SWINGS WERE GOOD WITH NO FURTHER DEFECTS NOTED.