As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS FOR BNA A/C ON CLIMBOUT HAD A EICIAS WITH A MESSAGE THAT THE NR 1 BLEED VALVE WAS CLOSED IN FLIGHT. THE CREW RETURNED TO BNA AND SWAPPED A/C. MAINTENANCE REMOVED AND REPLACED THE PUSHBUTTON IAW EMB 145 AMM 20-13-04. OPS CHECK GOOD. OPS CHECKED THE NR 1 BLEED SYSTEM IAW EMB 145 AMM 36-11-01, OPS CHECK GOOD AND WAS RELEASED.