As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB PASSING FL180 EICAS MESSAGE DISPLAYS L ENG OVHT ALL OTHER ENG INDICATIONS WERE NORMAL. RETARDED L THROTTLE AND TURNED OFF L BLEED AIR. AFTER APPROXIMATELY 2 MIN THE EICAS MESSAGE WENT AWAY. DECLARED EMERGENCY AND LANDED WITH L ENG AT IDLE. COMPLIED WITH QRH. REPLACED HP2 DUCT ASSY AS PER MM36-11-01-4.