As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2372 - FLIGHT RETURNED TO GATE AFTER RECEIVING A NR 2 HYDRAULIC CAUTION WITH ASSOCIATED LOSS OF NR 2 HYDRAULIC QUANTITY. USERS OF NR 2 HYDRAULICS BECAME INOPERATIVE. HYDRAULIC PRESSURE FLUCTUATED BETWEEN 150 AND 2000 PSI. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE NR 1 MAIN LANDING BRAKE LINE RUPTURED. THE LINE WAS REPLACED AND OPERATIONAL CHECKS WERE GOOD. THE AIRCAFT WAS RETURNED TO SERVICE.