As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3542 - RDU - CREW RECEIVED A LANDING GEAR AIR/GND FAIL MESSAGE ON THE EICAS. MAINTENANCE PERFORMED AN INSPECTION OF THE CMC DATA AND FOUND A FAULT FOR THE LANDING GEAR AIR/GND PROXIMITY SWITCH. MAINTENANCE CLEANED AND RESEATED THE CONNECTOR AT THE NLG UPLOCK BOX. SYSTEM OPS CHECKED GOOD.