As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 8,000 FEET LOWER AFT BODY OVERHEAT LIGHT ILLUMINATED. CREW DECLARED AN EMERGENCY AND DIVERTED TO SFO. *S/D* MIANTENANCE REPLACED A LEAKING LEFT HAND PACK VALVE AND FAULTY CLAMP ON THE KEEL BEAM DUCT. NO FURTHER PROBLEMS REPORTED.