As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 830 SDQ-JFK, CREW DECLARED EMERGENCY AND AIRCRAFT DIVERTED TO SJU DUE TO AT CRUISE OF 34000, RECEIVED A GREEN HYD RESERVOIR LEVEL LOW ECAM INDICATING A LOSS OF GREEN HYD FLUID. THE TECHNICIAN REMOVED AND REPLACED NR 1 ENGINE HYD PRESSURE SWITCH IAW AMM 29-11-17.