As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE DRIVEN HYDRAULIC PUMP MAKES NO PRESSURE WITH AN EICAS MESSAGE L ENG DRIVEN PUMP. FOUND PUMP DRIVE SHAFT SEIZED. REPLACED LH RETURN FILTER AND CASE DRAIN FILTERS BECAUSE OF DEBRIS AND LH SYSTEM RETURN FILTER. RESERVICED HYDRAULIC SYSTEM.