As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT, APPROX 200 NM SOUTH OF STATION, THE CREW HAD A GREEN SYS HYD SYS FAILURE. THE CREW ELECTED TO RETURN. PAN PAN DECLARED. THE FAILURE RESULTED IN THE CREW NEEDING TO PERFORM AN ALTERNATE GEAR SELECTION. FLIGHT LANDED WITHOUT FURTHER INCIDENT. RESOLUTION YAW DAMPER SERVO REPLACED IAW AMM 27-26-51.