What was found
LEVEL CRUISE AT 340, RECEIVED A HYD QTY LOW FOLLOWED BY A LOW PRESSURE GREEN SYSTEM. LOW PRESSURE LIGHT GREEN SYSTEM REMAINED ILLUMINATED. COMPLIED WITH ECAM AND QRH. DECLARED AN EMERGENCY AND CONTINUED FLIGHT TO DESTINATION. GREEN QTY IN RED ZONE, INCREASED ON SHORT FINAL. FOUND A PIN HOLE IN THE B LINE. REMOVED THE LINE IAW MM 20-23-11-00, REPAIRED AND REINSTALLED. REMOVED AND REPLACED SERVO CONTROL PRESSURE SWITCH 19CB IAW AMM 27-14-18-04.