As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T963/04MAY - AT CRUISE LEFT BLEED DUCT OVERHEAT INDICATIONS. RETURNED TO DFW AND LANDED OVERWEIGHT WITHOUT INCIDENT. RESEATED DUCT LEAK CONTROL CARD AND REPLACED CRACKED LEFT HEAT EXCHANGER. SYSTEM GROUND CHECKED NORMAL OPERATION.