As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, RECEIVED A BLEED 1 LEAK MESSAGE IN FLIGHT, WHILE IN ICING CONDITIONS. DIVERTED TO KSDF AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE UPPER T-DUCT O-RING. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.