What was found
(CAN) NR 1 HYD. FLUID HOT CAUTION LIGHT CAME ON DURING CRUISE. NR 1 ENG. HYD PUMP CAUTION LIGHT CAME ON. NR 1 HYD QUANTITY DROPPED TO 0. EMERGENCY DECLARED. FLAPLESS LANDING CARRIED OUT. FINDINGS: HYDRAULIC FLUID PRESENCE WAS NOTED INTO ENGINE 1 NACELLE. LINE FROM CHECK VALVE TO LT CASE DRAIN FILTER OVERHEATED AND LEAKING. NR 1 SYSTEM PRESSURE, RETURN AND CASE DRAIN FILTERS CONTAMINATED WITH PARTICLES COMING FROM LT EDP.ACTIONS: NR 1 HYD SYSTEM FLUSHED. R/R PRESSURE, RETURN AND CASE DRAIN FILTERS. R/R NR 1 EDP AND SPU.