As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING FLIGHT THEY RECEIVED A BLEED 1 LEAK MESSAGE ON THE EICAS. THE FLIGHT DIVERTED TO CMH AND LANDED WITHOUT INCIDENT. THE ENGINE GROUND START COUPLING WAS REPLACED, AS WELL AS THE O-RINGS AT JOINTS 3 AND 23. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.