As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDD - NR 1 ENGINE LOST ALL A SYSTEM HYDRAULIC FLUID DURING ENGINE START. INVESTIGATION REVEALED THAT THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP PRESSURE LINE WAS DAMAGED, CAUSING THE FLUID LOSS. THE HYDRAULIC PRESSURE LINE WAS REPLACED AND LEAK CHECKED PER MM 29-11-0. CASE DRAIN FILTER INSPECTED PER MM 29-11-41. HYDRAULIC SYSTEM SERVICED PER MM 12-12-0.