As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) APPROXIMATELY 1 HR AFTER DEPARTURE THE CREW REPORTED A GREEN HYDRAULIC SYSTEM LOW PRESSURE INDICATION AND RETURNED TO AIRPORT. NO EMERGENCY WAS DECLARED AND LANDING WEIGHT WAS BELOW MAXIMUM. HYD LINE REPLACED ON NR 1 ENGINE. LEAK CHECK CARRIED OUT. NO FAULT. CONSIDERED SERVICEABLE.