What was found
DURING CRUISE, THE NR 1 ENGINE LOW PRESSURE LIGHT CAME ON FOLLOWED BY LOSS OF SYS A. RAN QRH FOR BOTH. ACFT GROUNDED. EMERGENCY LANDING. INSPECTED SYSTEM A FOUND EDP LEAKING. REMOVED SYSTEM A EDP IAW AMM 29-11-21-000-801-001. INSPECTED CASE DRAIN FILTER. NO METAL CONTAMINATION FOUND. R & R CASE DRAIN FILTERS ELEMENT IAW AMM 29-11-41-00/400-801. INSTALLED SYSTEM A EDP IAW AMM 29-11-27, LEAK CHECKED GOOD. REMOVED AND REPLACED ACOUSTIC FOR THE A SYSTEM IAW AMM 29-11-21, LEAK CHECKED GOOD. ACCOMPLISHED NR 1 ENG START IAW AMM 71-00-00-800-808-F00. NO PROBLEMS NOTED. LEAK CHECKED A SYSTEM CASE DRAIN FILTER. OP'S CHECKED GOOD IAW AMM 29-11/400-801. REPLACED NR 1 ENG HYD PUMP IAW AMM 29-11-11-400-801-001, OPS & LEAK CHECKED GOOD.