As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE APPLYING TO POWER AT THE START OF THE TO ROLL THE 1 EDP CAUTION MESSAGE CAME ON AND THE NR 1 HYDRAULIC QTY WENT TO ZERO. MAINTENANCE INVESTIGATION FOUND A CHAFED HYDRAULIC LINE IN THE AFT EQUIPMENT BAY THAT WAS LEAKING. THE LINE HAD CHAFED AGAINST STRINGER NR 7 AND THE LT PACK WATER SEPARATOR DRAIN LINE. THE HYDRAULIC LINE, WATER SEPARATOR LINE AND DAMAGE TO STR WAS REPAIRED. HYD LINE, PN MM670-75131-001.