What was found
EN ROUTE FROM IAD TO PHX FLIGHT CREW OBSERVED A LOSS OF THE GREEN SYSTEM HYDRAULICS, DECLARED EMERGENCY AND LANDED WITHOUT FURTHER EVENT. MAINTENANCE FOUND THE PLUG ON TOP THE NR 1 ENGINE DRIVEN PUMP LEAKING. REMOVED AND REPLACED THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP IAW AMM 29-11-51-04. OPERATIONAL CHECK GOOD. FUNCTIONAL TEST OF HYD EDP CONFIRMED FAILURE OF UNIT. SOLENOID WAS FOUND WORN BEYOND LIMITS, REPLACED SOLENOID AND PACKINGS. UNIT REPAIRED AND TESTED IAW CMM 29-11-34, REV. 4.