What was found
(CAN) DUE TO A COMPLETE LOSS OF THE GREEN HYDRAULIC SYSTEM OCCURRED IN FLIGHT THE FLIGHT CREW ON AC909 DECLARED A PAN PAN WITH ATC. TOW REQUIRED OFF RUNWAY. SYSTEMS AFFECTED ARE: GREEN HYD, SPLR 1+5, CAT 3 DUAL, N.W.STEER, AUTO BRK, NORM BRK, L/G RETRACT, REVERSER 1, YAW DAMPER 1 RESOLUTION FOUND HYD PRESSURE LINE NR 1 ENG FROM EDP TO PRESSURE SWITCH WITH A PIN HOLE LEAK. LINE REPLACED IAW AMM. GRD RUN C/OUT SERV.