As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB AFTER LANDING GEAR RETRACTION, THE NR 4 HYDRAULIC QUANTITY WENT FROM 8 GALLONS TO 2 GALLONS AND THE LOW QUANTITY LIGHT ILLUMINATED. THE NR 2 HYDRAULIC QUANTITY WENT FROM 5 GALLONS TO 8 GALLONS. AIRCRAFT DIVERTED TO SEA AND LANDED WITHOUT INCIDENT. REPLACED THE NR 15 BRAKE SHUTTLE VALVE AND OPERATIONAL CHECK GOOD.