As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK - FLT 922 - LOG 7257329 - DURING CLIMB OUT, ENROUTE, CREW REPORTED THAT THE LT HYDRAULIC LEVEL WENT TO ZERO BUT THEY WERE ABLE TO MAINTAIN PRESSURE. CREW RETURNED AND LANDED HAVING TO BE BEING TOWED TO THE GATE. MAINTENANCE REMOVED AND REPLACED A HYDRAULIC LINE IN THE NR 1 ENGINE PYLON. LEAK CHECK WAS GOOD. LT HYDRAULIC SYSTEM WAS SERVICED.