As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH, AFTER GEAR EXTENSION (3 GREEN), CREW RECEIVED HYDRAULIC LEVEL LOW LIGHT AND 0 HYDRAULIC FLUID INDICATION. APPROACH WAS DISCONTINUED, CHECK LIST FOLLOWED, EMERGENCY DECLARED, AND UNSCHEDULED LANDING AT ALTERNATE AIRPORT PERFORMED WITHOUT INCIDENT. MAINTENANCE EVALUATION FOUND NOSE LANDING GEAR ACTUATOR EXTEND HYDRAULIC LINE RUPTURED ADJACENT TO SWAGED FITTING DUE TO FLEXING. LINE WAS REMOVED AND REPLACED IAW AMM.