As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ROLL, LOST NR 1 HYDRAULIC SYSTEM. ABORTED TAKEOFF AND RETURNED TO THE GATE. MAINTENANCE FOUND THE LEFT NOSE WHEEL STEERING CYLINDER LEAKING. REPLACED THE STEERING CYLINDER, CHECKED FILTERS, AND REFILLED SYSTEM. LEAK AND OPERATIONAL CHECK OK.