As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE AIRCRAFT WAS ENROUTE WHEN THE CREW NOTICED A LOSS OF HYDRAULIC PRESSURE. THEY RETURNED TO ORIGIN AND THE AIRCRAFT WAS JACKED AND HYDRAULIC PRESSURE APPLIED. THE FLEXIBLE LINE FROM THE L/H HYDRAULIC PUMP TO THE FILTER WAS FOUND RUPTURED. NEW LINE INSTALLED.