As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE AT FL310, GOT AMBER HYD GREEN RSVR LO LEVEL ECAM. COMPLIED WITH ECAM AND QRH PROCEDURES. DIVERTED BACK TO KIND. DECLARED EMERGENCY WITH INDY CENTER. EMERGENCY GEAR EXTENSION SUCCESSFUL. LANDED 23L KIND UNEVENTFULLY. TOWED TO GATE. REMOVED & REPLACED PRESSURE SWITCH 30WW . INSTALLED ORINGNAL HP MANIFOLD RELIEF VALVE ASSY. OPS & LEAK CHECKED GOOD. PERFORMED GENERAL BLEED PROCEDURES ON WRI 29-01/6894.