As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 4089 THE CREW REPORTED EXTINGUISHER BOTTLE-B INOP MESSAGE IN FLIGHT. THE AIRCRAFT RETURNED TO CLEVELAND AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 2 ENGINE FIRE BOTTLE. THE AIRCRAFT WAS RELEASED FOR SERVICE.