As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER DEPARTURE GREEN HYD SYS FAILED. RETURNED FOR MX. PAN PAN DECLARED WITH ATC. CRASH FIRE RESCUE ON STANDBY FOR ARRIVAL. TOWED TO GATE. AFTER ARRIVAL RESOLUTION CHAFED HYD LINE REPLACED AS PP 320-54-57635. CASE DRAIN, LP & HP HYD FILTERS & EDP REPLACED IAW AMM 29-11-51-401. IDLE ENG RUN & LEAK CHECK PERFORMED, NO FAULTS.