As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR AIR GROUND FAIL MESSAGE ON EICAS AFTER GEAR RETRACTION DURING CLIMB OUT, RETURN TO BLOCKS. MAINTENANCE INSPECTED AND REPAIRED WIRES IN THE LT FORWARD MLG WOW SWITCH CONNECTOR PLUG AND REPLACED THE SAME LOCATION CONNECTOR PLUG, OPS CHECK GOOD.