As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - ON CLIMB THROUGH 1000 OVERHEAT LIGHT ILLUMINATED. CREW TURNED OFF ENGINE BLEED SYSTEM AND LIGHT EXTINGUISHED. RETURNED TO LAX AND LANDED WITHOUT INCIDENT. ON LANDING FOUND NUMBER ONE ENGINE ACCESS PANELS OPEN. REPLACED NUMBER ONE ENGINE HIGH PRESSURE NUMBER 6 DIFFUSER DUCT. SYSTEM GROUND CHECKED NORMAL OPERATION.