As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT LOST ALL NR 1 HYDRAULICS ABOUT 30 MINUTES OUT. FLIGHT RETURNED. EMERGENCY DECLARED. NR 1 HYD EDP FOUND HEAVY LEAKAGE. NR 1 ENG EDP REPLACED. TUBE REPAIRED PER GNMM 1-0-13-020. SWAGE UNION INSTALLED AT HYD TUBE IN BS 1200 LT FUSELAGE. NO LEAK FOUND.