As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC PRESSURE GAUGE INDICATED 0 PSI IN FLIGHT. VARIED BETWEEN 0 AND 1000 PSI THEN WENT TO 0 PSI FOR THE REMAINDER OF THE FLIGHT. REMOVED AND REPLACED HYDRAULIC PRESSURE TRANSDUCER. AND CONNECTOR PLUG FOR PRESSURE TRANSDUCER (P339) IAW MM 29-30-00. OPS CHECKED GOOD. LEAK CHECKED GOOD.