As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INBOUND, PILOT NOTICED TOTAL HYD SYS FAILURE. PILOT DECLARED AN EMER & PERFORMED A MANUAL LG EXTENSION. PILOT RECEIVED THREE GREEN DOWN & LOCKED INDICATOR LIGHTS & LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING REVEALED FAULTY HYD ACCUMULATOR. REPLACED ACCUMULATOR & PERFORMED HYD SYS OPERATIONAL CHECKS, ALL CHECKS WERE NORMAL.