As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF, DURING FLAP RETACTION ECAM MSG HYDRAULIC BLUE ENGINE PUMP PRESSURE LOW CAME ON INTERMITTENTLY. AIRCRAFT RETURNED TO VANCOUVER. FOUND NR 2 ENGINE RETURN LINE LEAKING FROM A CRACK ELBOW. LINE REPLACED AND LEAK CHECKED OK. ALL FILTERS AND ENGINE GROUND RUN.