As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA FLT 5955 THE CREW REPORTED THE NR 1 BLEED VALVE WOULD NOT OPEN DURING FLIGHT. CLOSED INDICATION ON THE EICAS. THE AIRCRAFT RETURNED TO BNA AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NR 1 BLEED VALVE PUSHBUTTON SWITCH. OPERATIONAL CHECKS WERE GOOD.