As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB - THE OIL TEMPERATURE GAUGE ON THE LEFT ENG TURNED RED INDICATING OVERHEAT. THE OIL PRESSURE GAUGE ON THE LEFT ENG ALSO INDICATED VERY LOW OIL PRESSURE. CREW DECLARED AN EMERGENCY AND RETURNED BACK TO PDX. LEFT MASTER AND GEARBOX CHIP DETECTORS REVEAL NO FINDINGS AT THIS TIME PER 72-60-00-001. THIS CLEARS D660890.