As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5984 -JAX TO CLE - DURING CLIMB, THE FLIGHT CREW RECEIVED A BLEED 1 LEAK MESSAGE AND RETURNED TO JAX AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND SEVERAL PANELS IN THE CARGO COMPARTMENT THAT WERE ABNORMALLY WARM, AND THE SOURCE WAS FOUND TO BE THE O-RING AT JOINT 19 WHICH HAD BLOWN OUT BEHIND THOSE PANELS. MAINTENANCE THEN REPLACED THE O-RING AND RECONNECTED THE BLEED DUCTS AND THE BLEED SYSTEM, OPS AND LEAK CHECKED GOOD.