As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, CREW REPORTED THAT THE NR 2 HYD PRESSURE AND QUANTITY FELL TO 0 AT ACCELERATION HEIGHT. THE CREW RETURNED TO THE FIELD SHUTDOWN THE ENGINES AND THE ACFT WAS TOWED BACK TO THE GATE. THE GROUND MX CREW FOUND A HYD CHECK VALVE LEAKING. THEY R & R THE CHECK VALVE. AN OPS AND LEAK CHECK PRODUCED SATISFACTORY RESULTS AND THE ACFT WAS RETURNED TO SERVICE.