As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH (#1) HYDRAULIC SYSTEM FAILURE AFTER #1 ENGINE STARTED EICAS L HYD PRESS LOW AMBER HYD QUANTITY WENT TO 0% FLUID ON GROUND REMOVED AND REPLACED THE LINE AND C/W BLEEDING OF THE # 1 HYD SYSTEM OPERATED THE SYSTEM NO FURTHER LEAKS OR DEFECTS NOTED