As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1721, JFK-NAS. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) 'HYD G RSVR LOW- LOSS OF ALL GREEN SYS FLUID EDP SELECTED OFF PER ECAM, LOSS FOR 5 MIN AFTER FLUID LOSS; REF L/P 427237-1 FOR ENG #1 GREEN HYD SYS PRESSURE LINE REPLACEMENT AND L/P 4272332-2 (REMOVED AND REPLACED CASE DRAIN LINE IAW AMM 29-11-49. LEAKS CHECK OK IAW AMM 29-11-14.) FOR EASE DRAIN LINE REPLACEMENT. ALL CHECKS NORMAL. NO LEAKS NOTED AT THIS TIME. REPLENISHED GREEN HYD SYS IAW AMM 12-12-29.'