As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH FOR LANDING AND AFTER LOWERING THE LANDING GEAR, EXPERIENCED RAPID LOSS OF HYDRAULIC FLUID ON NO.1 SYSTEM. HYDRAULIC PRESSURE DECREASED TO ZERO AND BOTH LOW PRESSURE AND QUANTITY LIGHTS ILLUMINATED. CREW FOLLOWED COCKPIT OPERATING MANUAL PROCEDURE AND LANDED AIRCRAFT WITHOUT FURTHER INCIDENT. REPLACED THE LEFT BODY GEAR DOWNLOCK ACTUATOR AND PERFORMED CHECK. UNIT CHECKED NORMAL. AIRCRAFT RETURNED TO SERVICE.