As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C WAS EN ROUTE FROM BHM TO ORD WHEN CREW GOT A AIR GROUND FAIL MESSAGE ON THE ICIAS AND GEAR WOULDN'T RETRACT. CREW RETURNED TO BHM WITHOUT INCIDENT. A/C WAS FERRIED TO TYS WHERE MAINTENANCE COMPLIED WITH LANDING GEAR PROX SWITCHES ADJUST/TEST PROCEDURES IAW EMB 145 AMM 32-63-05. NO FAULT FOUND, OPS CHECK GOOD. REMOVED AND REPLACED THE LGEU IAW EMB 145AMM 32-32-01, OPS CHECK GOOD AND WAS RELEASED BACK TO SERVICE.