What was found
ON APPROACH TO DESTINATION STATION WSAP, LOSS OF LEFT SYSTEM HYDRAULIC QUANTITY AND SYSTEM PRESSURE. LOSS WAS NOTED AFTER SELECTING LANDING DOWN FOR LANDING. FLAPS CONFIGURED TO 20 BEFORE LOSS OF PRESSURE. APPROACH WAS ABANDONED. HYDRAULIC SYSTEM PRESSURE (LEFT ONLY)NON NORMAL CHECKLIST WAS COMPLIED WITH. ALTERNATE FLAP AND GEAR EXTENSION WERE NOT REQUIRED. EMERGENCY WAS DECLARED WITH WSAP ATC AND WERE DIRECTED TO DIVERT WSSS CHANGE AIRPORT. LANDED WITHOUT INCIDENT. POST FLIGHT INSPECTION REVEALED NOSE LANDING GEAR STEERING ACTUATOR FLEXIBLE HOSE DAMAGED. REMOVED AND REPLACED THE HOSE AND ELBOW. OPERATIONAL AND LEAK CHECK SATISFACTORY. AIRCRAFT RELEASED TO SERVICE.