What was found
DECLARED AN EMERGENCY AND ACFT RETURNED TO DEPARTURE, FOR A HYD GREEN RESERVOIR LOW AIR PRESSURE ECAM DURING CRUISE. GREEN, ENG 1, PUMP FAULT LIGHT & PTU FAULT LIGHT ON. COMPLIED WITH ECAM OR QRH PROCEDURES. ON DESCENT TURNED ENG 1 PUMP ON TO RESTORE GREEN SYS. NORMAL LANDING. CONFIRMED THAT SYS PRESSURES, ALL & QTYS REMAINED NORMAL EXCEPT LOW PRESSURE GREEN WHEN TURNED OFF IAW QRH. NO FLUCTUATIONS WERE OBSERVED. APPLIED TSM 29-11-00-810-801-A. CONCLUDED A BAD INTERMITTENT AIR PRESSURE SWITCH, 1384GH. R & R. OPS NORMAL IAW AMM 29-34-11. NO LEAKS NOTED.