As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, LT ENGINE HYD OVERHEAT EICAS MESSAGE CAME ON FOLLOWED BY LT HYD SYSTEM AND LOSS OF LT HYDRAULIC SYSTEM PRESSURE. INVESTIGATION REVEALED LEFT ENGINE DRIVEN PUMP (EPD) FAILED. REPLACED PUMP. CASE DRAIN AND PRESSURE FILTERS FOR BOTH EDP AND ACMP. OPS CHECK GOOD. (M)