What was found
PDIS 731 29-02 6666 23MAR23 OMA FACT AFTER CLEANUP DEPARTING KMEM, RECEIVED ECAM INDICATION OF LOW LEVEL ON GREEN HYD SYSTEM. LVL INDICATED ZERO ON ECAM AND OVERHEAD GAUGE. EXECUTED QRH FOR HYD LOW LEVEL. EMERGENCY DECLARED WITH OMA APPROACH ON ARRIVAL. ***EMERGENCY DECLARED*** FACT 24MAR23 00:23 OMA AMM: 29-31-11-04 REMOVED AND REPLACED GREEN SYS RESERVIOR QUANTITY TRANSMITTER PER A300 AMM REF NOTED ABOVE. LEAK AND OPS CHECK IS GOOD AT THIS TIME. TRANSMITTER GREEN SYS RES MANUFACTURER - UNKOWN P/N - 64752-026-1 S/N - AB1726