As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C WAS DEPARTING BHM WHEN THE ICAS MESSAGE SHOWED GEAR NOT RETRACTED. A/C RETURNED TO BLOCK AND MAINTENANCE REMOVED AND REPLACED THE LGEU, BUT DID NOT FIX PROBLEM. A/C WAS FERRIED TO TYS AND MAINTENANCE REMOVED AND REPLACED THE NR 1 AND NR 2 PROX SWITCHES. A/C WAS REL FOR A TEST FLIGHT AND TEST FLIGHT WAS SATISFACTORY. A/C WAS THEN REL FOR REVENUE SERVICE.