As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH INTO SAN, THE GREEN HYDRAULIC SYSTEM PRESSURE AND QUANTITY DECREASED TO ZERO. ACCOMPLISHED MANUAL EXTENSION OF THE LANDING GEAR. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOOTING REVEALED NO LEAKS. SERVICED GREEN HYDRAULIC RESERVOIR AND EXERCISED FLIGHT CONTROLS AND RESERVICED RESERVOIR. OPS AND LEAK CHECKED OK.