As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THEY LOST THE YELLOW HYDRAULIC SYSTEM ENROUTE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED AND LANDED SAFELY WITHOUT FURTHER INCIDENT. AIRCRAFT WAS GROUNDED. MAINTENANCE REPLACED THE NR 2 ENGINE HYDRAULIC LINE IAW AMM 29-11-51.