As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4427 AFTER TAKEOFF THE CREW REPORTED RECEIVING A LANDING GEAR/AIR GROUND FAIL MESSAGE ON MICAS. THE CREW DECLARED AN EMERGENCY AND RETUNED TO RUDE, LANDING WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. ADJUSTED THE LEFT AND RIGHT MAIN LANDING GEAR REAR PROXMITIY SWITCH GAP IAW 32-63-05 FNC GOOD IAW AMM 32-63-05. NO PARTS REMOVED OR REPLACED. PASSED FUNCTIONAL CHECK FLIGHT. THE AIRCRAFT WAS RETURNED TO SERVICE.