What was found
IN LEVEL FLT, CRUISE AT FL310, GREEN HYD SYS LOW LEVEL OCCURRED. BOTH OVERHEAD QTY AND ECAM INDICATED RED DOT. QRH ACTIONS DIRECTED MANUAL LANDING GEAR EXTENSION. NORMAL LANDING. GEAR PINNED FOR TOW-IN AFTER LANDING. GREEN PUMPS TURNED OFF AT 3250 PSI. FOUND LEFT NOTCH FLAP ACT T-FITTING LEAKING AT PACKING ON AFT TEE. REPLACED PACKING ON AFT L/NOTCH FLAP TEE PER SMP. LEAK CHECK GOOD. RESET LANDING GEAR FREE FALL EXTENSION PER 32-33-00-2. SECURED ALL PANELS, GEAR DOORS.