As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: HYDRAULIC GREEN SYSTEM LOW RESERVOIR LOW PRESSURE ECAM MESSAGE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PIT WHERE IT LANDED SAFELY AND WAS TOWED TO THE GATE WITHOUT FURTHER INCIDENT. REPLACED #1 ENGINE HYDRAULIC LINE THAT WAS FOUND TO BE CHAFFED / WORN THROUGH AT A TEFLON CLAMP. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 29-00-00 AND AFMM 20-17-21.