As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD SYSTEM 1 FLUID DROPPED TO 0% IN FLIGHT. FOUND A BROKEN O-RING ON PRESSURE TRANSDUCER ON THE NR 1 SYSTEM. R & R THE O-RING ON NAS1612-4. PERFORMED SERVICING OF HYD 1 SYSTEM AND CLEANED UP EVIDENCE OF HYD LEAK. RAN PUMP 1A AND 1B, OPERATED MULTIPLE HYD FUNCTIONS FOR 5 MINUTES. NO LEAKS NOTED.