As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 4 HYDRAULIC SYSTEM DROPPED BY 2 GALLONS DURING FIRST HOUR OF FLIGHT. DEPRESSURIZED SYSTEM AND LOSS STOPPED. FOUND HYD LINE IN PYLON AFT OF FIREWALL LOOSE. RESECURED AND TIGHTENED LINE. OPS AND LEAK CHECK GOOD PER MM 29-00-00 AND SERVICED FULL PER MM 12-00-00.