As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5862 IAD CREW REPORTED LG AIR/GRND FAIL MESSAGE ON EICAS DURING GEAR EXTENSION. GEAR OPERATED NORMALLY AND A/C LANDED WITHOUT INCIDENT. IAD MX REMOVED AND REPLACED LT NOSE DOOR ACTUATOR IAW EMB145 32-33-05 WITH OPERATIONAL AND LEAK CHECKS SUCCESSFUL. A/C WAS APPROVED FOR RETURN TO SERVICE.