As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - FLT 76 - ON CLIMB-OUT FROM SFO, CREW RECEIVED LEFT ENGINE OVERHEAT WARNING. CREW PERFORMED PROCEDURES AND THE WARNINGS PERSISTED. THE ENGINE WAS SECURED. FLIGHT RETURNED TO SFO AND LANDED WITH NO FURTHER INCIDENT. (SET 0:20). MAINTENANCE REPLACED THE LEFT ENGINE HP6 DUCT. (X)