What was found
AT FL340, .79 MACH, GRN HYD RSVR LO LEVEL INDICATION RECEIVED. COMPLIED W/ECAM. ZERO FLUID ON OVERHEAD PANEL & ON ECAM GREEN SYSTEM. RAN QRH: HYD RSVR LO LEVEL & HYD SYS LP PR. MANUALLY EXTENDED GR IAW QRH. NO NOSEWHEEL STEERING - TOWED BACK. EMERGENCY DECLARED W/ATC. COOCRDINATED W/MOC & GOC FOR UNEVENTFUL CYYC RECOVERY. NR 1 ENGINE GREEN HYDRAULIC SYSTEM CASE DRAIN LINE P/N: A2911503000500 REPLACED IAW AMM 20-23-11-00. NEW CLAMPS QTY 2 P/N: A2901501900000, INSTALLED WITH NEW LINE. NEW TEFLON BUSHINGS QTY 3 P/N: NSA935812-11, INSTALLED WITH NEW LINE. NR 1 ENGINE AFT FIRE EXTINGUISHER BOTTLE REMOVED AND REINSTALLED FOR ACCESS IAW AMM 26-21-15-04. GREEN SYSTEM HYDRAULICS SERVICED IAW AMM 12-12-29-00. HYDRAULIC LEAK CHECKS CARRIED OUT SERVICEABLE. RESET FREE FALL EXTENSION SYSTEM TO NORMAL OPERATING CONDITON IAW AMM 32-33-00-02. NR 1 ENGINE PYLON AFT FAIRING REMOVED AND REINSTALLED FOR ACCESS IAW AMM 54-54-00-04-02. AIRCRAFT OK FOR SERVICE.