As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT EXTEND. FLUID LEVEL OF HYD SYSTEM 3 WAS 5%. DECLARED EMERGENCY, PERFORMED EMERGENCY EXTENSION, LANDED WITHOUT INCIDENT. REPLACED MLG PRIORITY VALVE, WHICH WAS LEAKING AT EXPANSION FITTING. SERVICED SYSTEM 3. NO FURTHER DEFECTS. (S)