As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED A LANDING GEAR AIR & GND FAIL MSG AFTER TAKEOFF. THE CREW RETURNED TO FIELD & LANDED WITHOUT INCIDENT. REINSTALLED THE CONNECTOR ON THE LT MLG WEIGHT ON WHEELS SYS. OPERATIONAL CHECKS & LG SWINGS WERE GOOD WITH NO FURTHER DEFECTS NOTED.