As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK TO DEPARTURE. AFTER TAKEOFF, LOST ALL HYD 1 QUANTITY AND HYD 1 SYSTEM. COMPLIED WITH QRH AND RETURNED TO DEPARTURE. R & R RT NR 4 SPOILER PCU DUE TO LEAKING IAW AMM 27-65-01. REF LOG PAGE 1734048, ITEM NR 2. OPS AND LEAK CHECK GOOD.