As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2319 - EWR - FLIGHT CREW REPORTED "AIR GROUND FAIL" MESSAGE ON EICAS WITH ASSOCIATED MESSAGES: AIR GROUND SENSOR FAIL, GROUND IDLE STOP FAIL, AND AOA INOP. EWR MX REMOVED AND REPLACED NOSE WOW A/G PROX SWITCH AND PERFORMED OPERATIONAL CHECK SUCCESSFULLY. ACFT WAS APPROVED TO RETURN TO SERVICE.